Kaon decays at NA48: recent results and perspectives

Size: px
Start display at page:

Download "Kaon decays at NA48: recent results and perspectives"

Transcription

1 Kaon decays at NA48: recent results and perspectives Andrea Bizzeti University of Modena e Reggio Emilia and I.N.F.N. Sezione di Firenze, Italy on behalf of the NA48/2 collaboration 7 th International Workshop on Chiral Dynamics Newport News, VA, USA August 6 10, 22

2 A. Bizzeti Recent results from NA48 Newport News, /54 Outline Outline The NA48 experiment at CERN SPS K ± ππe ± ν (K e4 ), ππ scattering lengths, K µ4 K ± π ± γγ: new result (NA48/2 +NA62) K ± π ± π 0 γ ( ) : first observation of K ± π ± π 0 e + e K ± π ± l + l : recent results on K ± π ± µ + µ Conclusions

3 The NA48 experiment at CERN SPS A. Bizzeti Recent results from NA48 Newport News, /54 The NA48 experiment at CERN SPS K ± ππe ± ν (K e4 ), ππ scattering lengths, K µ4 K ± π ± γγ: new result (NA48/2 +NA62) K ± π ± π 0 γ ( ) : first observation of K ± π ± π 0 e + e K ± π ± l + l : recent results on K ± π ± µ + µ Conclusions

4 A. Bizzeti Recent results from NA48 Newport News, /54 The NA48 experiment at CERN SPS The NA48 experiment at CERN SPS

5 A. Bizzeti Recent results from NA48 Newport News, /54 The NA48 experiment NA48/2: Cambridge, CERN, Chicago, Dubna, Edinburgh, Ferrara, Firenze, Mainz, Northwestern, Perugia, Pisa, Saclay, Siegen, Torino, Vienna NA62: Birmingham, Bratislava, Bristol, CERN, Dubna, Fairfax, Ferrara, Firenze, Frascati, Glasgow, IHEP Protvino, INR Moscow, Liverpool, Louvain-La-Neuve, Mainz, Merced, Napoli, Perugia, Pisa, Prague, Roma I, Roma II, Saclay, San Luis Potosì, Stanford, Sofia, Torino, TRIUMF NA48 : direct CPV ( ε /ε) NA48/1 NA48/2 The NA48 experiment at CERN SPS 1997 : K L + K S 1998 : K L + K S 1999 : K L + K S ; K S HI 2000 : K L only ; K S HI 20 : K L + K S ; K S HI { 2002 : K S / hyperons { 2003 : K + + K 2004 : K + + K (K3π) { 2007 : K + + K NA62(R K) 2008 : K + + K (Ke2/Kµ2) NA62 { 24 : K + ( π + ν ν) High statistics for rare Kaon decays

6 A. Bizzeti Recent results from NA48 Newport News, /54 The NA48/2 beams ( ) Y Target 0 K K + TAX 17, mrad Defining collimator F DFD K K + Protecting collimator KABES 3 Final collimator Cleaning collimator 2nd DF DF Cleaning FRONT END ACHROMAT Quadrupole ACHROMAT Beam spectrometer 1 cm Momentum selection Quadruplet Focusing µ sweeping KABES 1 KABES 2 focused beams The NA48 experiment at CERN SPS Decay volume Kevlar window Vacuum tank Magnet DCH 1 DCH 4 He tank + Spectrometer Hodo LKr HAC MUV 400 GeV/c SPS protons unseparated secondary charged beam ( 5% kaons) 60 GeV/c (± 3.8% rms) simultaneous K + and K beams (K + /K 1.8) large charge symmetrization of experimental conditions 4 mm 4 mm, 10 µrad 10 µrad (rms) 22% of kaons decay in the 114 m long vacuum tank. Z 250 m 10 cm

7 A. Bizzeti Recent results from NA48 Newport News, /54 The NA48/2 detectors Detectors: The NA48 experiment at CERN SPS Magnetic spectrometer (4 DCH) 4 views/dch: redundancy efficiency σ p/p = 1.02% 0.044% p [GeV/c] Vacuum beam pipe He filled tank (1 atm) LKr electromagnetic calorimeter: quasi-homogeneous, high granularity σ E E = 3.2% E 1/2 9% 0.42% [GeV] E e/π discrimination (E/p) Scintillator hodoscope for charged fast trigger: σ(t) = 150 ps beam decay volume is upstream hadron calorimeter muon counters photon vetos

8 A. Bizzeti Recent results from NA48 Newport News, /54 K ± ππe ± ν (K e4 ), ππ scattering lengths, K µ4 The NA48 experiment at CERN SPS K ± ππe ± ν (K e4 ), ππ scattering lengths, K µ4 K ± π ± γγ: new result (NA48/2 +NA62) K ± π ± π 0 γ ( ) : first observation of K ± π ± π 0 e + e K ± π ± l + l : recent results on K ± π ± µ + µ Conclusions

9 A. Bizzeti Recent results from NA48 Newport News, /54 Ke4 decays K ± ππe ± ν (K e4 ), ππ scattering lengths, K µ4 K ± π + π e ± ν, called K e 4 (+ ) - charged mode K ± π 0 π 0 e ± ν, called K e 4 ( 0 0 ) - neutral mode dipion θ (π 0 ) K + θ dilepton (π 0 ) Five kinematic variables (Cabibbo-Maksymowicz 1965): s π = M 2 ππ, s e = M 2 eν, cos θ π, cos θ e, φ

10 K ± ππe ± ν (K e4 ), ππ scattering lengths, K µ4 Form factors: formalism of K e 4 decay A. Bizzeti Recent results from NA48 Newport News, /54 K e 4 hadronic current is described by form factors Partial Wave expansion, limited to S and P waves [ Pais-Treiman (1968) + Watson theorem (T invariance) ] Partial Wave expansion: 2 Axial Form Factors (F and G): F = F s e iδs + F p e iδp cos θ π G = G p e iδp 1 Vector Form Factor (H): H = H p e iδp The fit parameters (real) are: (+-) F s, F p, G p, H p, δ = δ s δ p (00) F s only (no P-wave) q 2 dependence can be studied from FF fitted in q 2 bins [ J.Phys. G 26, 1607 (1999) ] Fs 2 = fs [1 2 + f s q 2 + f s f s f s G p f s = gp f s q 4 + f e f s Meν 2 ] 2 4m 2 π + g p f s q 2, F p = f p, H p = h p [ M q 2 2 ] = ππ 4 m 2 1 π m π = m(π ± )

11 A. Bizzeti Recent results from NA48 Newport News, /54 K ± ππe ± ν (K e4 ), ππ scattering lengths, K µ4 Ke4(+-) decay: Event selection and background rejection Signal (π + π e ± ν ) topology: 3 charged tracks, forming a good vertex 2 opposite sign pions, 1 electron [E LKr /p 1] some missing energy and p T (ν) good reconstructed P K (missing ν hypothesis)

12 A. Bizzeti Recent results from NA48 Newport News, /54 K ± ππe ± ν (K e4 ), ππ scattering lengths, K µ4 Ke4(+-) decay: Event selection and background rejection Signal (π + π e ± ν ) topology: 3 charged tracks, forming a good vertex 2 opposite sign pions, 1 electron [E LKr /p 1] some missing energy and p T (ν) good reconstructed P K (missing ν hypothesis) Background main sources (suppressed by specific cuts): K + π + π π + (π + e + ν or π + mis-id) K + π + π 0 (π 0 e + e γ and e mis-id)

13 A. Bizzeti Recent results from NA48 Newport News, /54 K ± ππe ± ν (K e4 ), ππ scattering lengths, K µ4 Ke4(+-) decay: Event selection and background rejection Signal (π + π e ± ν ) topology: 3 charged tracks, forming a good vertex 2 opposite sign pions, 1 electron [E LKr /p 1] some missing energy and p T (ν) good reconstructed P K (missing ν hypothesis) Background main sources (suppressed by specific cuts): K + π + π π + (π + e + ν or π + mis-id) K + π + π 0 (π 0 e + e γ and e mis-id) Background control sample from data (assuming S = Q): π ± π ± e ν ( Wrong-Sign events )

14 A. Bizzeti Recent results from NA48 Newport News, /54 K ± ππe ± ν (K e4 ), ππ scattering lengths, K µ4 Ke4(+-) decay: Event selection and background rejection Signal (π + π e ± ν ) topology: 3 charged tracks, forming a good vertex 2 opposite sign pions, 1 electron [E LKr /p 1] some missing energy and p T (ν) good reconstructed P K (missing ν hypothesis) Background main sources (suppressed by specific cuts): K + π + π π + (π + e + ν or π + mis-id) K + π + π 0 (π 0 e + e γ and e mis-id) Background control sample from data (assuming S = Q): π ± π ± e ν ( Wrong-Sign events ) Ratio Right-Sign : Wrong-Sign = 2 : 1 if coming from K 3π (dominant) 1 : 1 if coming from K 2π

15 K ± ππe ± ν (K e4 ), ππ scattering lengths, K µ4 Ke4(+-) decay: background rejection A. Bizzeti Recent results from NA48 Newport News, /54 Data sample: events. Total background is less than 1% Reconstructed Kaon momentum (GeV/c) Background estimated from π ± π ± e ν Wrong-Sign events in Data checked with MC simulation of background processes Points Hisogram Yellow hist. = Data = MC simulation = background ( 5 to be visible) Data/MC ratio

16 K ± ππe ± ν (K e4 ), ππ scattering lengths, K µ4 Ke4(+-) relative Form Factors: fit results A. Bizzeti Recent results from NA48 Newport News, /54 Fs 2 = fs [1 2 + f s q 2 + f s q 4 + f e f s f s f s Meν 2 ] 2 4 m 2 ; π G p f s = g p f s + g p f s q 2 F p f s = f p f s ; Systematics: H p f s = h p f s mostly from background + acceptance control comparable or smaller than statistical error Total statistics ( ) value stat syst f s/f s ±0.007 ±0.005 f s /f s ±0.007 ±0.006 f e/f s ±0.006 ±0.007 f p /f s ±0.003 ±0.004 g p /f s ±0.0 ±0.0 g p/f s ±0.7 ±0.3 h p /f s ±0.5 ±0.008 Published in Eur. Phys J. C70 (20) 635

17 K ± ππe ± ν (K e4 ), ππ scattering lengths, K µ4 Ke4(+-) decay: branching fraction A. Bizzeti Recent results from NA48 Newport News, /54 K ± e 4 (+-) PDG: (4.09 ± 0.10) 10 5 BR(K ± e 4) = (Ns Nb) A nε n BR(K N n A 3π) ± sε s Use π ± π + π decays as normalization N s, N b, N n : number of signal ( ), background (0.95% of K e 4) and normalization ( ) events A s, A n, ε s ε n : signal and normalization acceptance (18.16% and 23.97% ) and trigger efficiency (98.5% and 97.7% ) BR(K ± π ± π + π ) = (5.59 ± 0.04)%

18 A. Bizzeti Recent results from NA48 Newport News, /54 Ke4(+-) decay: branching fraction stat. exp. total Use π ± π + π decays as normalization N s, N b, N n : number of signal ( ), background (0.95% of K e 4) and normalization ( ) events A s, A n, ε s ε n : signal and normalization acceptance (18.16% and 23.97% ) and trigger efficiency (98.5% and 97.7% ) BR(K ± π ± π + π ) = (5.59 ± 0.04)% K ± ππe ± ν (K e4 ), ππ scattering lengths, K µ4 K ± e 4 (+-) PDG: (4.09 ± 0.10) 10 5 BR(K ± (Ns Nb) A nε n e 4) = BR(K N n A 3π) ± sε s K +, K (first measurement)

19 A. Bizzeti Recent results from NA48 Newport News, /54 Ke4(+-) decay: branching fraction stat. exp. total Use π ± π + π decays as normalization N s, N b, N n : number of signal ( ), background (0.95% of K e 4) and normalization ( ) events A s, A n, ε s ε n : signal and normalization acceptance (18.16% and 23.97% ) and trigger efficiency (98.5% and 97.7% ) BR(K ± π ± π + π ) = (5.59 ± 0.04)% New result K ± ππe ± ν (K e4 ), ππ scattering lengths, K µ4 K ± e 4 (+-) PDG: (4.09 ± 0.10) 10 5 BR(K ± (Ns Nb) A nε n e 4) = BR(K N n A 3π) ± sε s K +, K (first measurement) Relative Systematic Uncertainty (%) Acceptance, beam geom Muon vetoing 0.16 Accidental activity 0.21 Particle ID 0.09 Background 0.07 Radiative effects 0.08 Trigger efficiency 0.11 Simulation statistics 0.05 Total systematics 0.37 External error [BR(K 3π )] 0.72 arxiv: [hep-ex] ; PLB (22), in the press BR(K + e 4 ) = (4.255 ± 0.008) 10 5 ; BR(K e 4 ) = (4.261 ± 0.1) 10 5 BR[K ± e 4 (+-)] = (4.257 ± 0.004stat ± 0.6syst ± 0.031ext) 10 5

20 A. Bizzeti Recent results from NA48 Newport News, /54 K ± ππe ± ν (K e4 ), ππ scattering lengths, K µ4 Ke4(00) BR measurement: event reconstruction K ± π 0 π 0 e ± ν relative to K ± π 0 π 0 π ±, BR=(1.761 ± 0.022)% Common event reconstruction for (π 0 π 0 + charged track): Find γ cluster pairs 1(ab) and 2(cd) and: 1) derive vertex positions Z 1, Z 2 using π 0 mass constraint: Z 1 = Z(LKr) 1 m(π 0 ) D(ab) E ae b Z 2 = Z(LKr) 1 m(π 0 ) D(cd) E ce d 2) require: Z 1 Z 2 < 5 m Z n = 1 (Z1 + Z2) within fiducial volume 2 3) combine with a charged track if Z 3 (CDA to beam line) satisfies Z 3 Z n < 8 m up to now: no PID

21 K ± ππe± ν (Ke4 ), ππ scattering lengths, Kµ4 Ke4(00) BR measurement: signal selection I Assign mπ to the charged track, plot Pt (to beam axis) vs invariant mass I elliptic cut separates K3π from Ke4 candidates PT (GeV/c) I vs M(3π) MK (GeV/c2 ) electron identification: E/p and shower properties A. Bizzeti Recent results from NA48 Newport News, /54

22 K ± ππe ± ν (K e4 ), ππ scattering lengths, K µ4 Ke4(00) decay: branching fraction A. Bizzeti Recent results from NA48 Newport News, /54 Use π ± π 0 π 0 decays as normalization N s, N b, N n : number of signal (44 909), background (1.3% of K e 4) and normalization ( ) events A s, A n, ε s ε n : signal and normalization acceptance (1.77% and 4.11% ) and both trigger efficiencies in the range 92-98% BR(K ± π ± π 0 π 0 ) = (1.761 ± 0.022)% K ± e 4 (00) BR(K ± e 4) = PDG: (2.2 ± 0.4) 10 5 (Ns Nb) A nε n BR(K N n A 3π) ± sε s

23 K ± ππe ± ν (K e4 ), ππ scattering lengths, K µ4 Ke4(00) decay: branching fraction A. Bizzeti Recent results from NA48 Newport News, / stat. syst. ext Use π ± π 0 π 0 decays as normalization N s, N b, N n : number of signal (44 909), background (1.3% of K e 4) and normalization ( ) events A s, A n, ε s ε n : signal and normalization acceptance (1.77% and 4.11% ) and both trigger efficiencies in the range 92-98% BR(K ± π ± π 0 π 0 ) = (1.761 ± 0.022)% K ± e 4 (00) BR(K ± e 4) = PDG: (2.2 ± 0.4) 10 5 (Ns Nb) A nε n BR(K N n A 3π) ± sε s Relative Systematic Uncertainty (%) Background 0.35 Simulation statistics 0.12 Form factor dependence 0.20 Radiative effects 0.23 Trigger efficiency 0.80 Particle ID 0.10 Beam geometry 0.10 Total systematics 0.94 External error [BR(K 3π )] 1.25

24 K ± ππe ± ν (K e4 ), ππ scattering lengths, K µ4 Ke4(00) decay: branching fraction A. Bizzeti Recent results from NA48 Newport News, / stat. syst. ext Use π ± π 0 π 0 decays as normalization N s, N b, N n : number of signal (44 909), background (1.3% of K e 4) and normalization ( ) events A s, A n, ε s ε n : signal and normalization acceptance (1.77% and 4.11% ) and both trigger efficiencies in the range 92-98% BR(K ± π ± π 0 π 0 ) = (1.761 ± 0.022)% K ± e 4 (00) BR(K ± e 4) = Preliminary result analysis in progress PDG: (2.2 ± 0.4) 10 5 (Ns Nb) A nε n BR(K N n A 3π) ± sε s Relative Systematic Uncertainty (%) Background 0.35 Simulation statistics 0.12 Form factor dependence 0.20 Radiative effects 0.23 Trigger efficiency 0.80 Particle ID 0.10 Beam geometry 0.10 Total systematics 0.94 External error [BR(K 3π )] 1.25 BR[K ± e 4 (00)] = (2.595 ± 0.2 stat ± syst ± ext ) 10 5

25 A. Bizzeti Recent results from NA48 Newport News, /54 K ± ππe ± ν (K e4 ), ππ scattering lengths, K µ4 Ke4 decay: Form Factors variation (Fs/fs) K e ± 4 (+ ) charged mode q 2 = M2 ππ 1, m 4 m 2 π = m(π + ) π q 2

26 A. Bizzeti Recent results from NA48 Newport News, /54 K ± ππe ± ν (K e4 ), ππ scattering lengths, K µ4 Ke4 decay: Form Factors variation (Fs/fs) K e ± 4 (+ ) charged mode q 2 (Fs/fs) q 2 q 2 = M2 ππ 1, m 4 m 2 π = m(π + ) π K e ± 4 (0 0) neutral mode blue line = polynomial fit (q 2 > 0) red line = extrapolation from fit + negative interference with ππ rescattering New! using known values of a 0 and a 2 K ± π+ (π 0 ) π - (π 0 ) ν ± e π 0 π 0

27 A. Bizzeti Recent results from NA48 Newport News, /54 K ± ππe ± ν (K e4 ), ππ scattering lengths, K µ4 Ke4(+-): absolute Form Factors BR overall form factor normalization: K ± e 4 (+-) f s = ± stat ± 0.7 syst ± ext = ± norm New! f s = ± stat ± syst ± norm = ± stat ± syst ± norm f s f e = ± stat ± syst ± norm f p = ± 0.7 stat ± syst ± norm g p = ± stat ± syst ± norm g p = ± stat ± syst ± norm h p = ± stat ± syst ± 0.4 norm PLB (22), in the press

28 K ± ππe ± ν (K e4 ), ππ scattering lengths, K µ4 Ke4(+-) decay and ππ scattering lengths A. Bizzeti Recent results from NA48 Newport News, /54 The S-wave ππ scattering lengths a 0 and a 2 (I = 0 and I = 2) are precisely predicted by ChPT : a 0 = ( ± ) (1/m π ) a 2 = ( ± 0.00) (1/m π ) [ Colangelo, Gasser, Leutwyler, Nucl. Phys. B 603, 125 (20); Phys. Rev. Lett. 86, 5008 (20) ]

29 K ± ππe ± ν (K e4 ), ππ scattering lengths, K µ4 Ke4(+-) decay and ππ scattering lengths The S-wave ππ scattering lengths a 0 and a 2 (I = 0 and I = 2) are precisely predicted by ChPT [NPB 603 (20) 125, PRL 86 (20) 5008]. A. Bizzeti Recent results from NA48 Newport News, /54 Two statistically independent measurements by NA48/2:

30 K ± ππe ± ν (K e4 ), ππ scattering lengths, K µ4 Ke4(+-) decay and ππ scattering lengths The S-wave ππ scattering lengths a 0 and a 2 (I = 0 and I = 2) are precisely predicted by ChPT [NPB 603 (20) 125, PRL 86 (20) 5008]. A. Bizzeti Recent results from NA48 Newport News, /54 Two statistically independent measurements by NA48/2: 1. from the phase shift δ(m ππ) = δ s δ p in Ke4 decay [Eur.Phys.J. C70 (20) 635]

31 K ± ππe ± ν (K e4 ), ππ scattering lengths, K µ4 Ke4(+-) decay and ππ scattering lengths The S-wave ππ scattering lengths a 0 and a 2 (I = 0 and I = 2) are precisely predicted by ChPT [NPB 603 (20) 125, PRL 86 (20) 5008]. A. Bizzeti Recent results from NA48 Newport News, /54 Two statistically independent measurements by NA48/2: 1. from the phase shift δ(m ππ) = δ s δ p in Ke4 decay [Eur.Phys.J. C70 (20) 635] 2. from the cusp in M 2 ( π 0 π 0) in K ± π ± π 0 π 0 decay [Eur.Phys.J. C64 (2009) 589]

32 A. Bizzeti Recent results from NA48 Newport News, /54 K ± ππe ± ν (K e4 ), ππ scattering lengths, K µ4 Ke4(+-) decay and ππ scattering lengths The S-wave ππ scattering lengths a 0 and a 2 (I = 0 and I = 2) are precisely predicted by ChPT [NPB 603 (20) 125, PRL 86 (20) 5008]. Two statistically independent measurements by NA48/2: 1. from the phase shift δ(m ππ) = δ s δ p in Ke4 decay [Eur.Phys.J. C70 (20) 635] 2. from the cusp in M 2 ( x 10 3 π 0 π 0) in K ± π ± π 0 π 0 decay [Eur.Phys.J. C64 (2009) 589] [2m(π + )] [2m(π + )] Interference between K ± π ± π 0 π 0 and K ± π ± π + π, π + π π 0 π 0 M 2 (π 0 π 0 ) [ (GeV/c 2 ) 2 ] M 2 (π 0 π 0 ) [ (GeV/c 2 ) 2 ]

33 K ± ππe ± ν (K e4 ), ππ scattering lengths, K µ4 Ke4(+-) decay and ππ scattering lengths The S-wave ππ scattering lengths a 0 and a 2 (I = 0 and I = 2) are precisely predicted by ChPT [NPB 603 (20) 125, PRL 86 (20) 5008]. A. Bizzeti Recent results from NA48 Newport News, /54 Two statistically independent measurements by NA48/2: 1. from the phase shift δ(m ππ) = δ s δ p in Ke4 decay [Eur.Phys.J. C70 (20) 635] 2. from the cusp in M ( π 0 π 0) in K ± π ± π 0 π 0 decay [Eur.Phys.J. C64 (2009) 589] 0-0. NA48/2 (68% CL contours) Ke4,Cusp,combined Cusp Ke [ a 0, a 2 values in units of 1/m(π + ) ]

34 K ± ππe ± ν (K e4 ), ππ scattering lengths, K µ4 Ke4(+-) decay and ππ scattering lengths The S-wave ππ scattering lengths a 0 and a 2 (I = 0 and I = 2) are precisely predicted by ChPT [NPB 603 (20) 125, PRL 86 (20) 5008]. A. Bizzeti Recent results from NA48 Newport News, /54 Two statistically independent measurements by NA48/2: 1. from the phase shift δ(m ππ) = δ s δ p in Ke4 decay [Eur.Phys.J. C70 (20) 635] 2. from the cusp in M ( π 0 π 0) in K ± π ± π 0 π 0 decay [Eur.Phys.J. C64 (2009) 589] Different systematics: eletron misid and background vs. calorimeter and trigger 0 NA48/2 (68% CL contours) Ke4,Cusp,combined Cusp Different theoretical inputs: Roy equations and isospin breaking correction vs. rescattering in final state and ChPT expansion Ke [ a 0, a 2 values in units of 1/m(π + ) ]

35 K ± ππe ± ν (K e4 ), ππ scattering lengths, K µ4 Ke4(+-) decay and ππ scattering lengths The S-wave ππ scattering lengths a 0 and a 2 (I = 0 and I = 2) are precisely predicted by ChPT [NPB 603 (20) 125, PRL 86 (20) 5008]. A. Bizzeti Recent results from NA48 Newport News, /54 Two statistically independent measurements by NA48/2: 1. from the phase shift δ(m ππ) = δ s δ p in Ke4 decay [Eur.Phys.J. C70 (20) 635] 2. from the cusp in M ( π 0 π 0) in K ± π ± π 0 π 0 decay [Eur.Phys.J. C64 (2009) 589] Different systematics: eletron misid and background vs. calorimeter and trigger 0 NA48/2 (68% CL contours) Ke4,Cusp,combined Cusp Different theoretical inputs: Roy equations and isospin breaking correction vs. rescattering in final state and ChPT expansion Large overlap in the a 0, a 2 plane Ke [ a 0, a 2 values in units of 1/m(π + ) ]

36 K ± ππe ± ν (K e4 ), ππ scattering lengths, K µ4 Ke4(+-) decay and ππ scattering lengths The S-wave ππ scattering lengths a 0 and a 2 (I = 0 and I = 2) are precisely predicted by ChPT [NPB 603 (20) 125, PRL 86 (20) 5008]. A. Bizzeti Recent results from NA48 Newport News, /54 Two statistically independent measurements by NA48/2: 1. from the phase shift δ(m ππ) = δ s δ p in Ke4 decay [Eur.Phys.J. C70 (20) 635] 2. from the cusp in M ( π 0 π 0) in K ± π ± π 0 π 0 decay [Eur.Phys.J. C64 (2009) 589] Different systematics: eletron misid and background vs. calorimeter and trigger 0. 0 NA48/2 combined Ke4 + Cusp (stat. + syst.) errors 68% CL contour DIRAC Cusp Different theoretical inputs: Roy equations and isospin breaking correction vs. rescattering in final state and ChPT expansion ChPT Large overlap in the a 0, a 2 plane Impressive agreement with ChPT Ke [ a 0, a 2 values in units of 1/m(π + ) ]

37 A. Bizzeti Recent results from NA48 Newport News, /54 K ± ππe ± ν (K e4 ), ππ scattering lengths, K µ4 Kµ4 decays: status and perspectives Poor experimental knowledge Similar to K e 4, with one more vector form factor (R) FF and BR predicted by ChPT [ NPB427 (1994) 427 ] K µ4 ± (0 0): Never observed so far few 10 3 events expected in NA48/2 data Goal: first observation, measure BR K ± µ4 (+ ): Measured BR = (1.4 ± 0.9) 10 5 from 9 events [ PDG ] Predicted BR = (0.412 ± 0.8) 10 5 [ NPB427 (1994) 427 ] several 10 3 events expected in NA48/2 data Goal: measure BR + first attempt to measure R form factor

38 K ± π ± γγ: new result (NA48/2 +NA62) A. Bizzeti Recent results from NA48 Newport News, /54 The NA48 experiment at CERN SPS K ± ππe ± ν (K e4 ), ππ scattering lengths, K µ4 K ± π ± γγ: new result (NA48/2 +NA62) K ± π ± π 0 γ ( ) : first observation of K ± π ± π 0 e + e K ± π ± l + l : recent results on K ± π ± µ + µ Conclusions

39 A. Bizzeti Recent results from NA48 Newport News, /54 The K ± π ± γγ rare decay K ± π ± γγ: new result (NA48/2 +NA62) Detailed ChPT predictions: leading contribution at O(p 4 ), important corrections at O(p 6 ) [ D Ambrosio, Portoles, PLB 386 (1996) 403 ] spectrum and rate predicted as a function of an unknown parameter ĉ NA48/2 (2004) data Data K ± π ± π 0 π 0 ± K π ± π 0 (γ) ± K π ± γγ M(π ± γγ), GeV/c Total 300 events from 2 data samples: NA48/2 (2004): 3 days of dedicated run NA62-R K (2007): 3 months with downscaled minimum bias trigger Combined analysis: see NA62 talk by T. Spadaro Preliminary results: model dependent BR = (1. ± 0.06) 10 6 [ PDG: BR = (1.10 ± 0.32) 10 6 ] ĉ [O(p 4 )] = 1.56 ± 0.23 ĉ [O(p 6 )] = 2.00 ± 0.26

40 K ± π ± π 0 γ ( ) : first observation of K ± π ± π 0 e + e A. Bizzeti Recent results from NA48 Newport News, /54 The NA48 experiment at CERN SPS K ± ππe ± ν (K e4 ), ππ scattering lengths, K µ4 K ± π ± γγ: new result (NA48/2 +NA62) K ± π ± π 0 γ ( ) : first observation of K ± π ± π 0 e + e K ± π ± l + l : recent results on K ± π ± µ + µ Conclusions

41 A. Bizzeti Recent results from NA48 Newport News, /54 K ± π ± π 0 γ : Theory Two sources of γ radiation: K ± π ± π 0 γ ( ) : first observation of K ± π ± π 0 e + e Inner Bremsstrahlung (IB) and Direct Emission (DE) After integrating on T π: Two kinematic variables: T π = π ± kinetic energy in K ± rest frame W 2 = (p π p γ )(p K p γ ) m 2 K m2 π dγ ± dw = dγ± [ IB 1 (IB) dw + 2m 2 Km 2 π cos(±φ + δ1 1 δ0) 2 X E W 2 (INT) + m 4 Km 4 ( π XE 2 + X M 2) ] W 4 (DE)

42 A. Bizzeti Recent results from NA48 Newport News, /54 K ± π ± π 0 γ: NA48/2 results dγ ± dw = dγ± IB dw K ± π ± π 0 γ ( ) : first observation of K ± π ± π 0 e + e [ 1 (IB) + 2m 2 Km 2 π cos(±φ + δ1 1 δ0) 2 X E W 2 (INT) + m 4 Km 4 ( π XE 2 + X M 2) ] W 4 (DE) IB DE INT is known from K ± π ± π 0 (Low theorem) + QED corrections amplitude contains electric X E and magnetic X M dipole terms is interference between IB and electric DE (X E ) amplitudes

43 A. Bizzeti Recent results from NA48 Newport News, /54 K ± π ± π 0 γ: NA48/2 results dγ ± dw = dγ± IB dw K ± π ± π 0 γ ( ) : first observation of K ± π ± π 0 e + e [ 1 (IB) + 2m 2 Km 2 π cos(±φ + δ1 1 δ0) 2 X E W 2 (INT) + m 4 Km 4 ( π XE 2 + X M 2) ] W 4 (DE) IB DE INT is known from K ± π ± π 0 (Low theorem) + QED corrections amplitude contains electric X E and magnetic X M dipole terms is interference between IB and electric DE (X E ) amplitudes NA48/2 (0 < T π < 80 MeV): > 10 6 events, < 0.% background

44 A. Bizzeti Recent results from NA48 Newport News, /54 K ± π ± π 0 γ: NA48/2 results dγ ± dw = dγ± IB dw K ± π ± π 0 γ ( ) : first observation of K ± π ± π 0 e + e [ 1 (IB) + 2m 2 Km 2 π cos(±φ + δ1 1 δ0) 2 X E W 2 (INT) + m 4 Km 4 ( π XE 2 + X M 2) ] W 4 (DE) IB DE INT is known from K ± π ± π 0 (Low theorem) + QED corrections amplitude contains electric X E and magnetic X M dipole terms is interference between IB and electric DE (X E ) amplitudes NA48/2 (0 < Tπ < 80 MeV): > 10 6 events, < 0.% background Final NA48/2 results: [ EPJC68 (20) 75 ] Frac(DE) = ( 3.19 ± 0.16) 10 2 Frac(INT) = ( 2.21 ± 0.41) 10 2 first evidence A CP = Γ+ Γ Γ + +Γ < (90% CL) first measurement

45 A. Bizzeti Recent results from NA48 Newport News, /54 K ± π ± π 0 e + e K ± π ± π 0 γ ( ) : first observation of K ± π ± π 0 e + e Mainly from K ± π ± π 0 γ π ± π ± e + e [ EPJC 72, 187 (22) ] DE and INT depend on X E and X M form factors Short distance contributions, sensitive to New physics NA48/2: first observation of K ± π ± π 0 e + e π ± π 0 e + e invariant mass PRELIMINARY NA48/2 ( data): events in signal region Backgrounds low m: K ± π ± π 0 π 0 D (π 0 D e + e γ LOST) high m: K ± π ± π 0 D (π 0 D e + e γ) + γ ACC Analysis in progress

46 K ± π ± l + l : recent results on K ± π ± µ + µ A. Bizzeti Recent results from NA48 Newport News, /54 The NA48 experiment at CERN SPS K ± ππe ± ν (K e4 ), ππ scattering lengths, K µ4 K ± π ± γγ: new result (NA48/2 +NA62) K ± π ± π 0 γ ( ) : first observation of K ± π ± π 0 e + e K ± π ± l + l : recent results on K ± π ± µ + µ Conclusions

47 A. Bizzeti Recent results from NA48 Newport News, /54 K ± π ± l + l : theory K ± π ± l + l : recent results on K ± π ± µ + µ K ± π ± e + e, K ± π ± µ + µ Suppressed (BR 10 7 ) FCNC processes Loop-induced decays ( K ± π ± γ ) dγ dz = P(z) W(z) 2 ; z = ( mll m K ) 2 ; P(z) = phase space factor Several models exist for W(z) form factor Linear: W(z) = G F m 2 K f 0 (1 + δ z) ChPT O(p 6 ) : W(z) = G F m 2 K (a + + b + z) + W ππ (z) [JHEP 8, 4 (1998)] ChPT + large-n C QCD: W(z) = W( w, β, z) [PLB 595, 3 (2004)] Dubna ChPT: W(z) = W(M a, M ρ, z) [hep-ph/ ]

48 K ± π ± l + l : recent results on K ± π ± µ + µ K ± π ± l + l : NA48/2 data analysis A. Bizzeti Recent results from NA48 Newport News, /54 Event selection ( data) 3 tracks, 1 vertex, total charge = ±1 p, p T consistent with K ± 3 charged particles Use E LKr /p for Particle ID (e ± vs µ ±, π ± ) K πee : z > 0.08 (m ee > m π 0) kinematical cut against π ± π 0 D background K πµµ : signals in MUV counters for positive muon identification π ± l + l invariant mass cut (Kaon mass peak) Efficiencies and background measured from data. Normalization channels (π ± π 0 Dalitz ; π± π + π ) : 3 tracks, similar topology first-order cancellation of most systematics Observation of both K + and K decays first measurement of CP-violating charge asymmetry A CP BR+ BR BR + +BR

49 A. Bizzeti Recent results from NA48 Newport News, /54 K ± π ± l + l : recent results on K ± π ± µ + µ K ± π ± e + e : NA48/2 results [PLB 677, 246 (2009)] Signal (π ± e + e ) Normalization channel (π ± π 0 D ) Events Events Kµ3D K 2π D M(π 0.51 ± e + e ), 0.52 GeV/c 0.53 m(π ± e + e ) [GeV/c 2 ] M(π ± π 0 ), GeV/c D m(π ± π 0 D) [GeV/c 2 ] 7253 K ± π ± e + e events, with 1.0% background BR(K ± π ± e + e ) = (3.11 ± 0.04 stat ± 0.05 syst ± 0.08 ext ± 0.07 model ) 10 7 BR(K ± π ± e + e ) = (3.11 ± 0.12) 10 7 First observation of K πee A CP = ( 2.2 ± 1.5 stat ± 0.6 syst ) 10 2 A CP < (90% CL) Theoretical predictions: A SM CP 10 5 [ JHEP 9808 (1998) 4 ] A SUSY CP 10 3 [ EPJC 53 (2008) 567 ] Measured W(z) agrees with theoretical models

50 A. Bizzeti Recent results from NA48 Newport News, /54 K ± π ± µ + µ : data sample K ± π ± l + l : recent results on K ± π ± µ + µ Events Signal (π ± µ + µ ) K 3π K πµµ M(π ± µ µ 0.51 ), GeV/c 0.52 Normalization channel (π ± π + π ) Events M(3π ± ), GeV/c 3120 K ± π ± µ + µ event candidates [ > 4 total world statistics ] (3.3 ± 0.7)% background (K ± π ± π + π with π µν )

51 A. Bizzeti Recent results from NA48 Newport News, /54 K ± π ± l + l : recent results on K ± π ± µ + µ K ± π ± µ + µ : NA48/2 results [PLB 697, 107 (21)] BR(K ± π ± µ + µ ) = (9.62 ± 0.21 stat ± 0.11 syst ± 0.07 ext ) 10 8 BR(K ± π ± µ + µ ) = (9.62 ± 0.25) 10 8 Error improved (x 1/3) w.r.t. BNL E865 [PRL84,2580(2000)] CPV asymmetry: BR + = (9.70 ± 0.26) 10 8 ; BR = (9.49 ± 0.35) 10 8 A CP (K ± πµµ) BR+ BR BR + +BR = (1.1 ± 2.3)10 2 A CP < (90% CL) Factor 4 improvement w.r.t. HyperCP [PRL 88, 1118 (2002)] Theoretical predictions: A SM CP 10 4 [JHEP 9808, 4 (1998)] A SUSY CP 10 3 [PLB 538, 130 (2002); JHEP 0207, 068 (2002)] Forward-backward asymmetry in θ Kµ : (θ Kµ = angle between the kaon and the opposite-sign lepton in the dilepton rest frame) A FB = ( 2.4 ± 1.8) 10 2 A FB < (90% CL) Theoretical predictions: A FB 10 3 [PRD 69, (2004); PRD 67, (2003)] Measured W(z) agrees with theoretical models and is consistent with K πee Search for Lepton Number Violating decays K ± π µ ± µ ±

52 K ± π ± l + l form factors dγ K ± π ± l + l : recent results on K ± π ± µ + µ ( ) 2 mll Models tested for W(z) dz = P(z) W(z) 2 ; z = Linear: W(z) = G Fm 2 K f 0 (1 + δ z) m K ChPT O(p 6 ) : W(z) = G Fm 2 K (a + + b +z) + W ππ (z) [JHEP 8, 4 (1998)] ChPT + large-n C QCD: W(z) = W( w, β, z) [PLB 595, 3 (2004)] Dubna ChPT: W(z) = W(M a, M ρ, z) [hep-ph/ ] Measurements of BR and form factor parameters Decay K πee + K πee + K πee ± K πµµ + K πµµ ± Experiment BNL E777 BNL E865 CERN NA48/2 BNL E865 CERN NA48/2 Reference PRL68,278 PRL83,4482 PLB677,246 PRL84,2580 PLB697,107 Year (1992) (1999) (2009) (2000) (21) Nr. of events BR ± ± ± ± ± 0.25 f ± ± ± δ 1.31 ± ± ± ± 0.57 a ± ± ± b ± ± ± w ± ± ± 0.4 β 2.8 ± ± ± 0.62 M a [GeV/c 2 ] ± ± M ρ [GeV/c 2 ] ± ± A. Bizzeti Recent results from NA48 Newport News, /54

53 A. Bizzeti Recent results from NA48 Newport News, /54 K ± π ± l + l : recent results on K ± π ± µ + µ Search for K ± π µ ± µ ± decays Lepton Number Violating ( L = 2) decays Look for wrong-sign events in πµµ data K ± π ± µ + µ FCNC candidates K ± π µ ± µ ± LNV candidates Events Events K πµµ K 3π M(π ± µ µ ), GeV/c 1 K 3π M(πµµ), GeV/c N data = 52 N bkg = 52.6 ± 19.8 syst BR(K ± π µ ± µ ± ) < (90% CL) factor 3 improvement w.r.t. E865 [ PRL 85, 2877 (2000) ]

54 Conclusions A. Bizzeti Recent results from NA48 Newport News, /54 The NA48 experiment at CERN SPS K ± ππe ± ν (K e4 ), ππ scattering lengths, K µ4 K ± π ± γγ: new result (NA48/2 +NA62) K ± π ± π 0 γ ( ) : first observation of K ± π ± π 0 e + e K ± π ± l + l : recent results on K ± π ± µ + µ Conclusions

55 A. Bizzeti Recent results from NA48 Newport News, /54 Summary Conclusions K ± ππe ± ν [PLB, in the press (22)] 1.1M Ke4 (+-) and K e4 (00) events analized Precise determination of ππ scattering lengths from Ke4 and K 3π, in excellent agreement with ChPT prediction New improved measurements of K e4 BR and form factors Future studies on K µ4 decays, very little known K ± π ± γγ [preliminary] 300 events from NA48/2 + NA62 Preliminary results on Mγγ spectrum, BR and ChPT parameter ĉ K ± π ± π 0 γ ( ) First observation of K ± π ± π 0 e + e [preliminary] K ± π ± µ + µ [PLB 697, 107 (21)] Four times larger sample than existing world statistics Unprecedented precision achieved on BR and form factor Improved limits on: CPV and FB asymmetries, LNV decay

New limits on Heavy Neutral Lepton from Kaon CERN

New limits on Heavy Neutral Lepton from Kaon CERN New limits on Heavy Neutral Lepton from Kaon experiments @ CERN Monica Pepe INFN Perugia On behalf of the NA62 and NA48/2 Collaborations International Workshop on Baryon & Lepton Number Violation 2017

More information

PoS(EPS-HEP 2009)048. QCD tests at NA48/2 experiment. Gianluca Lamanna Scuola Normale Superiore & INFN Pisa - Italy

PoS(EPS-HEP 2009)048. QCD tests at NA48/2 experiment. Gianluca Lamanna Scuola Normale Superiore & INFN Pisa - Italy experiment Scuola Normale Superiore & INFN Pisa - Italy E-mail: gianluca.lamanna@cern.ch The main goal of the NA48/2 experiment was to measure the CP violating asymmetry in the charged kaon decay in three

More information

Jacopo Pinzino CERN HQL /05/2018

Jacopo Pinzino CERN HQL /05/2018 Search for K + π + ν ν at NA62 Jacopo Pinzino CERN HQL2018 30/05/2018 The NA62 Experiment NA62: High precision fixed-target Kaon experiment at CERN SPS Main goal: measurement of BR(K + π + υ υ) Broader

More information

Precision measurement of kaon radiative decays in NA48/2

Precision measurement of kaon radiative decays in NA48/2 Precision measurement of kaon radiative decays in NA48/2 INFN Sezione di Perugia E-mail: monica.pepe@pg.infn.it Kaon decays are an excellent laboratory to test low energy strong interaction perturbative

More information

Κ+ p+νν : first NA62 results

Κ+ p+νν : first NA62 results Κ+ p+νν : first NA62 results Speaker: Radoslav Marchevski On behalf of the NA62 collaboration Moriond EW Conference, 10 17th March 2018, La Thuile, Italy, Kaon physics @ NA62 `14-`18 NA62:Κ+ π+νν 2014

More information

Testing the m-e universality with ±

Testing the m-e universality with ± Testing the m-e universality with ± ± K l n decays Venelin Kozhuharov University of Sofia St. Kl. Ohridski / JINR Dubna Neutrino Oscilation Workshop 2006 on behalf of the NA48/2 collaboration Cambridge,

More information

Results on direct CP Violation in K ± 3π decays from the NA48/2 experiment at CERN

Results on direct CP Violation in K ± 3π decays from the NA48/2 experiment at CERN Crimea 2005 Giuseppina Anzivino 1 Results on direct CP Violation in K ± 3π decays from the NA48/2 experiment at CERN Giuseppina Anzivino University of Perugia and INFN On behalf of the NA48/2 collaboration:

More information

PoS(KAON)049. Testing the µ e universality with K ± l ± ν decays

PoS(KAON)049. Testing the µ e universality with K ± l ± ν decays University of Sofia "St. Kl. Ohridski" E-mail: Venelin.Kozhuharov@cern.ch The ratio R K = Γ(K ± e ± ν)/γ(k ± µ ± ν) provides a very powerful probe for the weak interactions structure. This ratio of decay

More information

Bernard Peyaud CEA Saclay, IRFU -SPP

Bernard Peyaud CEA Saclay, IRFU -SPP Measurements of pp scattering lengths from K ± decays Experimental studies of K 3p and K e4 decays with the NA48/2 experiment at CERN Bernard Peyaud CEA Saclay, IRFU -SPP On behalf of the NA48/2 collaboration:

More information

Search for K + π + νν decay at NA62 experiment. Viacheslav Duk, University of Birmingham for the NA62 collaboration

Search for K + π + νν decay at NA62 experiment. Viacheslav Duk, University of Birmingham for the NA62 collaboration Search for K + π + νν decay at NA62 experiment Viacheslav Duk, University of Birmingham for the NA62 collaboration Durham, 04-06.09.2017 1 Outlook 1. Motivation 2. NA62 experiment 3. Event selection 4.

More information

R. Fantechi CERN and INFN Sezione di Pisa on behalf of the NA62 Collaboration

R. Fantechi CERN and INFN Sezione di Pisa on behalf of the NA62 Collaboration Search for K + π + _ νν at NA62 R. Fantechi CERN and INFN Sezione di Pisa on behalf of the NA62 Collaboration Birmingham, Bratislava, Bristol, Bucharest, CERN, Dubna (JINR), Fairfax, Ferrara, Florence,

More information

PoS(KAON13)012. R K Measurement with NA62 at CERN SPS. Giuseppe Ruggiero. CERN

PoS(KAON13)012. R K Measurement with NA62 at CERN SPS. Giuseppe Ruggiero. CERN CERN E-mail: giuseppe.ruggiero@cern.ch A precision measurement of the ratio R K of the rates of kaon leptonic decays K e ν and K µ ν with the full minimum bias data sample collected with low intensity

More information

New Limits on Heavy Neutrino from NA62

New Limits on Heavy Neutrino from NA62 CERN E-mail: michal.koval@cern.ch The NA6 experiment at CERN collected large samples of charged kaon decays in flight with a minimum bias trigger configuration in 7 and in 15 using a completely new detector

More information

PRELIMINARY RESULT ON DIRECT CP VIOLATION FROM NA DATA. DAPNIA-SPP / CEA-Saclay, Gif/Yvette cedex, France. Abstract

PRELIMINARY RESULT ON DIRECT CP VIOLATION FROM NA DATA. DAPNIA-SPP / CEA-Saclay, Gif/Yvette cedex, France. Abstract PRELIMINARY RESULT ON DIRECT CP VIOLATION FROM NA48 1998 DATA Raphael Granier de Cassagnac DAPNIA-SPP / CEA-Saclay, 91191 Gif/Yvette cedex, France on behalf of the NA48 collaboration 1 Abstract We present

More information

π 0 Dalitz Transition Form Factor and other news from NA62 Nicolas Lurkin University of Birmingham, 26/04/2017

π 0 Dalitz Transition Form Factor and other news from NA62 Nicolas Lurkin University of Birmingham, 26/04/2017 π 0 Dalitz Transition Form Factor and other news from NA62 Nicolas Lurkin University of Birmingham, 26/04/2017 Outline π 0 transition form factor slope from the π 0 Dalitz decay at NA62 2007 The K + π

More information

Summary on CP Violation with Kaons

Summary on CP Violation with Kaons Summary on CP Violation with Kaons Patrizia Cenci INFN Sezione di Perugia XX Workshop on Weak Interaction and Neutrinos Delphi, June 7th 2005 On behalf of the NA48 Collaboration Cambridge, CERN, Chicago,

More information

Hyperon physics in NA48

Hyperon physics in NA48 Hyperon physics in NA48 M. Piccini a, on behalf of the NA48 collaboration a University of Perugia and INFN - Sezione di Perugia During 89 days of data taking in 22, NA48/I collected a large sample of hyperon

More information

The future NA48 programs at CERN. Patrizia Cenci. Yalta - Crimea, September 2001 New trends in high energy physics

The future NA48 programs at CERN. Patrizia Cenci. Yalta - Crimea, September 2001 New trends in high energy physics The future NA48 programs at CERN Patrizia Cenci INFN Perugia, Italy Yalta - Crimea, 22-29 September 2001 New trends in high energy physics On behalf of the NA48 Collaboration Patrizia Cenci The NA48 future

More information

Review of Standard Tau Decays from B Factories

Review of Standard Tau Decays from B Factories Review of Standard Tau Decays from B Factories Fabrizio Salvatore, RHUL Tau mass measurement Tau decays to strange particles: - Measurement of V us using τ s decays - τ KKπν τ, KKKν τ branching fractions

More information

Search for the dark photon in π 0 decays

Search for the dark photon in π 0 decays Search for the dark photon in π 0 decays Roberto Piandani 1,a 1 INFN Pisa Abstract. A sample of 1.69 10 7 fully reconstructed π 0 γe + e in the kinematic range m ee > 10MeV/c 2 with a negligible background

More information

PoS(EPS-HEP2015)572. Search for the dark photon in the π 0 decay. R. Fantechi INFN - Sezione di Pisa and CERN

PoS(EPS-HEP2015)572. Search for the dark photon in the π 0 decay. R. Fantechi INFN - Sezione di Pisa and CERN Search for the dark photon in the π 0 decay INFN - Sezione di Pisa and CERN E-mail: fantechi@cern.ch The NA8/ Collaboration has analyzed a sample of 1.7 7 π 0 γe + e collected at CERN in 00-00 to search

More information

NA62: Ultra-Rare Kaon Decays

NA62: Ultra-Rare Kaon Decays NA62: Ultra-Rare Kaon Decays Phil Rubin George Mason University For the NA62 Collaboration November 10, 2011 The primary goal of the experiment is to reconstruct more than 100 K + π + ν ν events, over

More information

Kaon Identification at NA62. Institute of Physics Particle, Astroparticle, and Nuclear Physics groups Conference 2015

Kaon Identification at NA62. Institute of Physics Particle, Astroparticle, and Nuclear Physics groups Conference 2015 Kaon Identification at NA62 Institute of Physics Particle, Astroparticle, and Nuclear Physics groups Conference 2015 Francis Newson April 2015 Kaon Identification at NA62 K πνν NA48 and NA62 K + π + νν

More information

Lepton Universality Tests with Kaons

Lepton Universality Tests with Kaons Lepton Universality Tests with Kaons Rainer Wanke Institut für Physik, Universität Mainz for the Flavianet Working Group on Kaon Decays KAON 2007 Frascati, May 24, 2007 Rainer Wanke, Universität Mainz,

More information

Measurement of the η mass by the NA48 Experiment

Measurement of the η mass by the NA48 Experiment Measurement of the η mass by the NA48 Experiment Rainer Wanke Institut für Physik, Universität Mainz Crystal Ball Meeting Mainz, March 20, 2004 Rainer Wanke, Crystal Ball Meeting, Mainz, March 20, 2004

More information

Particle Identification in the NA48 Experiment Using Neural Networks. L. Litov University of Sofia

Particle Identification in the NA48 Experiment Using Neural Networks. L. Litov University of Sofia Particle Identification in the NA48 Experiment Using Neural Networks L. Litov University of Sofia Introduction NA 48 detector is designed for measurement of the CP-violation parameters in the K decays

More information

New Limits on Heavy Neutrino from NA62

New Limits on Heavy Neutrino from NA62 New Limits on Heavy Neutrino from NA62 Michal Koval (CERN) michal.koval@cern.ch on behalf of the NA62 collaboration EPS HEP 2017 Venice, Italy, 5 12 July 2017 Kaon Decay Experiments at CERN Earlier: NA31

More information

Calorimetry in particle physics experiments

Calorimetry in particle physics experiments Calorimetry in particle physics experiments Unit N. 9 The NA48 ECAL example (LKR) Roberta Arcidiacono R. Arcidiacono Calorimetry 1 Lecture overview The requirements Detector layout & construction Readout

More information

PoS(Kruger 2010)048. B X s/d γ and B X s/d l + l. Martino Margoni SLAC-PUB Universita di Padova and INFN

PoS(Kruger 2010)048. B X s/d γ and B X s/d l + l. Martino Margoni SLAC-PUB Universita di Padova and INFN SLAC-PUB-15491 B X s/d γ and B X s/d l + l Universita di Padova and INFN E-mail: martino.margoni@pd.infn.it Flavour Changing Neutral Current transitions B X s/d γ and B X s/d l + l provide an excellent

More information

Measurement of the baryon number transport with LHCb

Measurement of the baryon number transport with LHCb Measurement of the baryon number transport with LHCb Marco Adinolfi University of Bristol On behalf of the LHCb Collaboration 13 April 2011 / DIS 2011 Marco Adinolfi DIS 2011-13 April 2011 - Newport News

More information

Particle Identification of the LHCb detector

Particle Identification of the LHCb detector HCP 2005 Particle Identification of the LHCb detector Ann.Van.Lysebetten@cern.ch on behalf of the LHCb collaboration CERN 5th July 2005 The LHCb experiment : introduction precision measurements of CP violation

More information

Electroweak Physics at the Tevatron

Electroweak Physics at the Tevatron Electroweak Physics at the Tevatron Adam Lyon / Fermilab for the DØ and CDF collaborations 15 th Topical Conference on Hadron Collider Physics June 2004 Outline Importance Methodology Single Boson Measurements

More information

Searches for Leptonic Decays of the B-meson at BaBar

Searches for Leptonic Decays of the B-meson at BaBar Searches for Leptonic Decays of the B-meson at BaBar Stephen Jacob Sekula (MIT) on behalf of the BaBar collaboration Presented at Frontiers in Contemporary Physics III Vanderbilt University May 22-28,

More information

SEARCH FOR CP VIOLATION IN

SEARCH FOR CP VIOLATION IN BELLE SEARCH FOR CP VIOLATION IN RADIATIVE AND HADRONIC D DECAYS AT BELLE Tara Nanut on behalf of the Belle Collaboration The XIIIth International Conference on Heavy Quarks and Leptons 6 May 16 1 { Tara

More information

New Physics search in penguin B-decays

New Physics search in penguin B-decays New Physics search in penguin B-decays Sanjay Swain, SLAC on behalf of BABAR Collaboration 13 th -18 th Dec 2007 Miami 2007 Outline What is New Physics (NP)? b > (d, s) penguin decays Exclusive Semi-inclusive

More information

Different approaches to calculate the K ± π ± π 0 e + e decay width

Different approaches to calculate the K ± π ± π 0 e + e decay width Eur. Phys. J. C 014 74:860 DOI 10.1140/epjc/s1005-014-860-0 Regular Article - Theoretical Physics Different approaches to calculate the K ± ± 0 e + e decay width S. R. Gevorkyan a,m.h.misheva Joint Institute

More information

Electroweak Measurements at LHCb!

Electroweak Measurements at LHCb! Electroweak Measurements at LHCb! Simone Bifani University of Birmingham (UK) on behalf of the LHCb collaboration LHCb workshop on quantum interference effects, QCD measurements and generator tuning CERN,

More information

D 0 -D 0 mixing and CP violation at LHC

D 0 -D 0 mixing and CP violation at LHC D -D mixing and CP violation at LHC Patrick Spradlin on behalf of the LHCb collaboration University of O Particle P 5 th International Workshop on the CKM Unitarity Triangle Rome, Italy 9-13 September

More information

Overview and Status of Measurements of F 3π at COMPASS

Overview and Status of Measurements of F 3π at COMPASS g-2 workshop Mainz: Overview and Status of Measurements of F 3π at COMPASS D. Steffen on behalf of the COMPASS collaboration 19.06.2018 sponsored by: 2 Dominik Steffen g-2 workshop Mainz 19.06.2018 Contents

More information

Study of e + e annihilation to hadrons at low energies at BABAR

Study of e + e annihilation to hadrons at low energies at BABAR Study of e + e annihilation to hadrons at low energies at BABAR V.Druzhinin Novosibirsk State University, BINP, Novosibirsk on behalf of the BABAR Collaboration International Symposium Advances in Dark

More information

Kaon Experiments at CERN! Recent Results and Prospects!

Kaon Experiments at CERN! Recent Results and Prospects! Kaon Experiments at CERN! Recent Results and Prospects! Giuseppina Anzivino! University of Perugia and INFN! on behalf of the NA62 and NA48/2 Collaborations! NuFact 2016 ICISE, Quy Nhon, August 21-27,

More information

Recent results and perspectives on pseudo-scalar mesons and form factors at BES III

Recent results and perspectives on pseudo-scalar mesons and form factors at BES III Meson Physics in Low-Energy QCD Workshop on Meson Transition Form Factors Recent results and perspectives on pseudo-scalar mesons and form factors at BES III Elisabetta Prencipe Johannes Gutenberg University

More information

Evidence for D 0 - D 0 mixing. Marko Starič. J. Stefan Institute, Ljubljana, Slovenia. March XLII Rencontres de Moriond, La Thuile, Italy

Evidence for D 0 - D 0 mixing. Marko Starič. J. Stefan Institute, Ljubljana, Slovenia. March XLII Rencontres de Moriond, La Thuile, Italy Evidence for D - D mixing - D mixing (page 1) Introduction Mixing observed in K, Bd and B s (26), not yet in D system D mixing in the SM governed by box diagrams Effective GIM suppression mixing in D system

More information

NA62 & Kaon Experiments

NA62 & Kaon Experiments NA62 & Kaon Experiments Outline: Evgueni Goudzovski (University of Birmingham) eg@hep.ph.bham.ac.uk 1) Ultra-rare K πνν decays: theory vs experiment. 2) NA62 and other K πνν experiments. 3) UK responsibilities

More information

Measurements of Leptonic B Decays from BaBar

Measurements of Leptonic B Decays from BaBar Measurements of Leptonic B Decays from BaBar Gregory Dubois-Felsmann Caltech for the BaBar collaboration ICHEP 2004 Heavy Quark Mesons and Baryons session Overview Motivations for studying leptonic B decays

More information

The η-meson Decay Program at WASA-at-COSY

The η-meson Decay Program at WASA-at-COSY Mitglied der Helmholtz-Gemeinschaft The η-meson Decay Program at WASA-at-COSY 31.08.2015 Daniel Lersch for the WASA-at-COSY collaboration Institute for Nuclear Physics The η-meson! " " " # #, (" + " -

More information

Physics at Hadron Colliders

Physics at Hadron Colliders Physics at Hadron Colliders Part 2 Standard Model Physics Test of Quantum Chromodynamics - Jet production - W/Z production - Production of Top quarks Precision measurements -W mass - Top-quark mass QCD

More information

Search for heavy neutrinos in kaon decays

Search for heavy neutrinos in kaon decays Search for heavy neutrinos in kaon decays L. Littenberg (work mainly done by A.T.Shaikhiev INR RAS) HQL-2016 Outline Motivation Previous heavy neutrino searches Experiment BNL-E949 Selection criteria Efficiency

More information

Study of the decays at Wasa-at-COSY. Elisabetta Prencipe on behalf of the Wasa Collaboration MesonNet Workshop, 17th -19th June 2013, Praha

Study of the decays at Wasa-at-COSY. Elisabetta Prencipe on behalf of the Wasa Collaboration MesonNet Workshop, 17th -19th June 2013, Praha Study of the decays at Wasa-at-COSY on behalf of the Wasa Collaboration MesonNet Workshop, 17th -19th June 2013, Praha Outline Introduction The Wasa-at-COSY detector decays in the pd reaction e+e e+e e+e

More information

SUSY-related Lepton and Hadron Flavor Results from Belle Yutaro Sato

SUSY-related Lepton and Hadron Flavor Results from Belle Yutaro Sato SUSY-related Lepton and Hadron Flavor Results from Belle Yutaro Sato For the Belle Collaboration (Nagoya Univ., KMI) 27 th Aug. 2015, SUSY2015 @ Lake Tahoe, USA New physics search at Belle 2 New particles

More information

Recent Results from Fermilab Charm Experiment E791. David A. Sanders. Representing the Fermilab Experiment E791 Collaboration

Recent Results from Fermilab Charm Experiment E791. David A. Sanders. Representing the Fermilab Experiment E791 Collaboration Recent Results from Fermilab Charm Experiment E791 David A. Sanders University of Mississippi Representing the Fermilab Experiment E791 Collaboration We report the results of some recent E791 charm analyses.

More information

Measurement of the Z ττ cross-section in the semileptonic channel in pp collisions at s = 7 TeV with the ATLAS detector

Measurement of the Z ττ cross-section in the semileptonic channel in pp collisions at s = 7 TeV with the ATLAS detector Measurement of the Z ττ cross-section in the semileptonic channel in pp collisions at s = 7 TeV with the ATLAS detector Sofia Consonni Università di Milano & INFN XCVII Congresso Nazionale della Società

More information

arxiv: v1 [hep-ex] 14 Sep 2015

arxiv: v1 [hep-ex] 14 Sep 2015 WSU HEP XXYY September 5, 5 arxiv:59.3v [hep-ex] Sep 5 Search for CP violation in D K + K, π + π and D π π Tara Nanut Department for Experimental Particle Physics Jozef Stefan Institute, Jamova 39, Ljubljana,

More information

Scalar mesons at KLOE

Scalar mesons at KLOE Salvatore Fiore QCD08 - July 9 th 2008 Montpellier 1 Scalar mesons at KLOE Salvatore Fiore (on behalf of the KLOE collaboration) Sapienza Università di Roma and INFN Roma Talk outline DAFNE and KLOE Scalar

More information

Rare b and c decays at LHCb

Rare b and c decays at LHCb Rare b and c decays at Preema Pais, EPFL! on behalf of the Collaboration!! HQL 8 May 8, 8 Yamagata, Japan RARE DECAYS AT Diverse physics program studying decays of b,c,s hadrons (Non-exhaustive) sampling:

More information

The Mystery of Vus from Tau decays. Swagato Banerjee

The Mystery of Vus from Tau decays. Swagato Banerjee The Mystery of Vus from Tau decays Swagato Banerjee Flavor generations in the Standard Model Vij: Mixing between Weak and Mass Eigenstates 2 Unitarity of the CKM matrix 1!! 3! 1! 2! 3! 2 1 V ud = 0.97408

More information

PHI PSI 08. Federico Nguyen. International Workshop on e+e- collisions from Phi to Psi

PHI PSI 08. Federico Nguyen. International Workshop on e+e- collisions from Phi to Psi PHI PSI 08 Laboratori Nazionali di Frascati (Roma), April 8 th 008 International Workshop on e+e- collisions from Phi to Psi A precise new KLOE measurement of F! with ISR and extraction of a µ!! for [0.35,0.95]

More information

LFV in Tau Decays: Results and Prospects at the LHC. Tau th International Workshop on Tau Lepton Physics Beijing September 22th, 2016

LFV in Tau Decays: Results and Prospects at the LHC. Tau th International Workshop on Tau Lepton Physics Beijing September 22th, 2016 LFV in Tau Decays: Results and Prospects at the LHC Kristof De Bruyn On behalf of the ATLAS, CMS & LHCb Collaborations Tau 216 14th International Workshop on Tau Lepton Physics Beijing September 22th,

More information

LHCb Semileptonic Asymmetry

LHCb Semileptonic Asymmetry CERN E-mail: mika.vesterinen@cern.ch A recent measurement of the CP violating flavour specific asymmetry in B s decays, a s sl, is presented. This measurement is based on a data sample corresponding to

More information

Nicolas Berger SLAC, Menlo Park, California, U.S.A.

Nicolas Berger SLAC, Menlo Park, California, U.S.A. SLAC-PUB-11414 August 25 Frascati Physics Series Vol. VVVVVV (xxxx), pp. - DAΦNE 24: Physics at meson factories Frascati, June. 7-11, 24 Selected Contribution in Plenary Session INCLUSIVE HADRONIC RESULTS

More information

PoS(ICHEP2012)049. Study of tau-pair production at HERA. Masaki Ishitsuka Tokyo Institute of Technology

PoS(ICHEP2012)049. Study of tau-pair production at HERA. Masaki Ishitsuka Tokyo Institute of Technology Tokyo Institute of Technology E-mail: ishitsuka@phys.titech.ac.jp for ZEUS Collaboration A study of tau-pair production has been performed with the ZEUS detector at HERA ep collider, using a data sample

More information

Measuring η π+ π- e+ e- with WASA at COSY. Daniel Coderre Hirschegg 2010

Measuring η π+ π- e+ e- with WASA at COSY. Daniel Coderre Hirschegg 2010 tglied der Helmholtz-Gemeinschaft Measuring η π+ π- e+ e- with WASA at COSY Daniel Coderre Hirschegg 2010 The WASA Detector ~20-170 Degrees ~3-18 Degrees - Internal experiment at COSY ring, Jülich, Germany

More information

Future prospects for the measurement of direct photons at the LHC

Future prospects for the measurement of direct photons at the LHC Future prospects for the measurement of direct photons at the LHC David Joffe on behalf of the and CMS Collaborations Southern Methodist University Department of Physics, 75275 Dallas, Texas, USA DOI:

More information

D Hadronic Branching Fractions and DD Cross Section at ψ (3770) from CLEO c

D Hadronic Branching Fractions and DD Cross Section at ψ (3770) from CLEO c D Hadronic Branching Fractions and DD Cross Section at ψ (3770) from CLEO c V. Credé 1 2 1 Cornell University, Ithaca, NY 2 now at Florida State University Tallahassee, FL Hadron 05 Outline 1 CESR-c CLEO-c

More information

Searches for CP violation in decays from BABAR and Belle

Searches for CP violation in decays from BABAR and Belle D Searches for CP violation in decays from BABAR and Belle Maurizio Martinelli on behalf of the BABAR Collaboration Università degli Studi di Bari and INFN FPCP 1 May 7 1, Torino ITALY CP violation in

More information

LHCb status. Marta Calvi. for the LHCb Collaboration. 103 rd LHCC meeting University Milano-Bicocca and INFN

LHCb status. Marta Calvi. for the LHCb Collaboration. 103 rd LHCC meeting University Milano-Bicocca and INFN LHCb status 103 rd LHCC meeting 22.09.2010 Marta Calvi University Milano-Bicocca and INFN for the LHCb Collaboration Data taking 3.2 pb -1 on tape eff ~91% Stable data taking, high efficiency in all systems,

More information

Matthew Charles, University of Iowa

Matthew Charles, University of Iowa Charm Decays in Matthew Charles, University of Iowa Representing the Collaboration The 3nd International Conference on High Energy Physics Beijing August 16, 4 Introduction Search for D l + l [11-964]

More information

Measurements of the W Boson Mass and Trilinear Gauge Boson Couplings at the Tevatron

Measurements of the W Boson Mass and Trilinear Gauge Boson Couplings at the Tevatron Measurements of the Boson Mass and Trilinear Gauge Boson Couplings at the Tevatron John Ellison University of California, Riverside, USA Selection of and Z events Measurement of the mass Tests of the gauge

More information

Overview of the Higgs boson property studies at the LHC

Overview of the Higgs boson property studies at the LHC Overview of the Higgs boson property studies at the LHC Giada Mancini, a, Roberto Covarelli b a LNF-INFN and University of Roma Tor Vergata, b INFN and University of Torino E-mail: giada.mancini@lnf.infn.it,

More information

Recent T2K results on CP violation in the lepton sector

Recent T2K results on CP violation in the lepton sector Recent T2K results on CP violation in the lepton sector presented by Per Jonsson Imperial College London On Behalf of the T2K Collaboration, December 14-20 2016, Fort Lauderdale, USA. Outline Neutrino

More information

Seaches fo log-lived paticles with displaced signatues at the LHC. Daniela Salvatore (INFN Cosenza) on behalf of the ATLAS and CMS Collaborations

Seaches fo log-lived paticles with displaced signatues at the LHC. Daniela Salvatore (INFN Cosenza) on behalf of the ATLAS and CMS Collaborations Seaches fo log-lived paticles with displaced signatues at the LHC Daniela Salvatore (INFN Cosenza) on behalf of the ATLAS and CMS Collaborations Outline A review of the most recent results from ATLAS &

More information

PoS(EPS-HEP2017)662. Charm physics prospects at Belle II

PoS(EPS-HEP2017)662. Charm physics prospects at Belle II Dipartimento di Matematica e Fisica, Università di Roma Tre and INFN Sezione di Roma Tre, Via della vasca navale 84, I-00146 Rome, Italy E-mail: giacomo.depietro@roma3.infn.it Belle II is a major upgrade

More information

PANIC August 28, Katharina Müller on behalf of the LHCb collaboration

PANIC August 28, Katharina Müller on behalf of the LHCb collaboration Measurements with electroweak bosons at LHCb PANIC August 28, 2014 on behalf of the LHCb collaboration Outline LHCb detector Measurements with electroweak bosons Motivation Z production Z plus jets, Z

More information

New results on flavor anomalies at LHCb

New results on flavor anomalies at LHCb New results on flavor anomalies at LHCb Paula Álvarez Cartelle on behalf of the LHCb collaboration Dark Matter @ LHC Heidelberg, April 2018 The indirect approach Study processes that are suppressed or

More information

The η-meson Decay Program at WASA-at-COSY

The η-meson Decay Program at WASA-at-COSY Mitglied der Helmholtz-Gemeinschaft The η-meson Decay Program at WASA-at-COSY 15.09.2015 Daniel Lersch for the WASA-at-COSY collaboration XVI International Conference on Hadron Spectroscopy The η-meson!

More information

B the Tevatron

B the Tevatron B Physics @ the Tevatron Stephanie Hansmann-Menzemer Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg DESY, 9 th of November 7 xxx p.1/1 Tevatron p p collisions at s = 1.96 TeV observed by

More information

Roberto Versaci on behalf of the KLOE collaboration. e+e- collisions from φ to ψ

Roberto Versaci on behalf of the KLOE collaboration. e+e- collisions from φ to ψ Charged kaons at KLOE on behalf of the KLOE collaboration 1/26 I get it! СП АСИ БО!!! 2/26 Outline Vus with charged kaons TAG mechanism K+ µ+ ν (γ) Semileptonic decays Charged kaon lifetime Conclusions

More information

PoS(STORI11)050. The η π + π π 0 decay with WASA-at-COSY

PoS(STORI11)050. The η π + π π 0 decay with WASA-at-COSY The η π + π π 0 decay with WASA-at-COSY Institute for Physics and Astronomy, Uppsala University E-mail: patrik.adlarson@physics.uu.se Recently, a large statistics sample of approximately 3 10 7 decays

More information

HQL Virginia Tech. Bob Hirosky for the D0 Collaboration. Bob Hirosky, UNIVERSITY of VIRGINIA. 26May, 2016

HQL Virginia Tech. Bob Hirosky for the D0 Collaboration. Bob Hirosky, UNIVERSITY of VIRGINIA. 26May, 2016 Bs CP-odd lifetime in Bs J/ψf0 and Afb for baryons at D0 2016 Virginia Tech Bob Hirosky for the D0 Collaboration 1 Tevatron Data D0 continues a rich physics program analyzing ~10fb-1 of recorded data from

More information

Studying η-meson Decays with WASA-at-COSY

Studying η-meson Decays with WASA-at-COSY Studying η-meson Decays with WASA-at-COSY Daniel Lersch 1, for the WASA-at-COSY Collaboration 1 Juelich Research Center, Germany Abstract. The η-meson is a unique tool in a way that it provides access

More information

arxiv: v2 [hep-ex] 12 Feb 2014

arxiv: v2 [hep-ex] 12 Feb 2014 arxiv:141.476v2 [hep-ex] 12 Feb 214 on behalf of the COMPASS collaboration Technische Universität München E-mail: stefan.huber@cern.ch The value of the pion polarizability is predicted with high precision

More information

Observation of the rare B 0 s µ + µ decay

Observation of the rare B 0 s µ + µ decay Observation of the rare B 0 s µ + µ decay The combined analysis of CMS and LHCb data Luke Pritchett April 22, 2016 Table of Contents Theory and Overview Detectors Event selection Analysis Flavor physics

More information

R. Mureşan. University of Oxford On behalf of LHCb Collaboration. Prepared for the CERN Theory Institute "Flavour as a Window to New Physics at LHC"

R. Mureşan. University of Oxford On behalf of LHCb Collaboration. Prepared for the CERN Theory Institute Flavour as a Window to New Physics at LHC May 8 CERN Theory Institute Charm Physics at LHCb R. Mureşan University of Oxford On behalf of LHCb Collaboration Prepared for the CERN Theory Institute "Flavour as a Window to New Physics at LHC" R. Mureşan

More information

e + e results from BaBar, status of muon (g-2) prediction and τ mass measurement at BESIII

e + e results from BaBar, status of muon (g-2) prediction and τ mass measurement at BESIII e + e results from BaBar, status of muon (g-2) prediction and τ mass measurement at BESIII (IHEP-LAL collaboration) Liangliang WANG Outline Introduction to hadronic vacuum polarization ee hadrons results

More information

LHCb Calorimetry Impact

LHCb Calorimetry Impact LHCb Calorimetry Impact Preema Pais! On behalf of the LHCb Collaboration! Workshop on the physics of HL-LHC, and perspectives at HE-LHC! November 1, 2017! THE LHCb DETECTOR Calorimetry! Located ~12.5 m

More information

Wolfgang Gradl. on behalf of the BABAR collaboration. Tau 2016, Beijing 23 rd September 2016

Wolfgang Gradl. on behalf of the BABAR collaboration. Tau 2016, Beijing 23 rd September 2016 ISR K u K u π (π ) Wolfgang Gradl on behalf of the collaboration Tau 216, Beijing 23 rd September 216 Motivation γ µ QED is precision physics u l 1 2 (u 2) l testbed for QED experimentally: electron ok

More information

D 0 Mixing and CP Violation at the BABAR Experiment

D 0 Mixing and CP Violation at the BABAR Experiment D 0 Mixing and CP Violation at the BABAR Experiment Giulia Casarosa INFN & Università di Pisa Società Italiana di Fisica XCV Congresso Nazionale Bari, 28 settembre - 3 ottobre Giulia Casarosa D 0 Mixing

More information

Perspectives on η η physics

Perspectives on η η physics Perspectives on η η physics S. Giovannella (INFN LNF) F. Ambrosino (Università e Sezione INFN, Napoli) xpected data sample Working hypothesis: 20 fb 1 of integrated luminosity (a factor 10 more w.r.t.

More information

Rare decays in the beauty, charm and strange sector

Rare decays in the beauty, charm and strange sector Rare decays in the beauty, charm and strange sector Marcin Chrzaszcz mchrzasz@cern.ch FPCP, Hyderabad 14-18 July 218 1 / M.Chrzaszcz (CERN) Rare decays in the beauty, charm and strange sector 1/26 26 Outline

More information

RESULTS FROM B-FACTORIES

RESULTS FROM B-FACTORIES XL International Meeting on Fundamental Physics Benasque, May 12 RESULTS FROM B-FACTORIES (IFIC Valencia) τ - τ + τ - τ + B factories KEKB s=10.58 GeV e + e- Υ(4s) Υ(4s) B B z ~ c βγ τ B ~ 200µm BaBar

More information

Flavour Physics at hadron machines

Flavour Physics at hadron machines Flavour Physics at hadron machines KIAS Phenomenology Workshop Seoul, Korea, 17-19 November 2011 T. Nakada EPFL-LPHE Lausanne, Switzerland B physics, started with hadron machine First discovery of b-quark

More information

PDF Studies at LHCb! Simone Bifani. On behalf of the LHCb collaboration. University of Birmingham (UK)

PDF Studies at LHCb! Simone Bifani. On behalf of the LHCb collaboration. University of Birmingham (UK) PDF Studies at LHCb! Simone Bifani University of Birmingham (UK) On behalf of the LHCb collaboration MENU 213 Rome 3th September - 4th October 213 Outline Introduction Analyses» Z/γ* ll, l =, e, τ#» W

More information

Identification of the Higgs boson produced in association with top quark pairs in proton-proton

Identification of the Higgs boson produced in association with top quark pairs in proton-proton Identification of the Higgs boson produced in association with top quark pairs in proton-proton collision: an analysis of the final state containing three leptons with the ATLAS detector Valentina Vecchio,

More information

e e with ISR and the Rb Scan at BaBar

e e with ISR and the Rb Scan at BaBar e e with ISR and the Rb Scan at BaBar + + Francesco Renga Università di Roma La Sapienza & INFN Roma on behalf of the BaBar Collaboration 1 Introduction B Factories showed an exciting capability for improving

More information

The direct CP Violation measurement of the CERN NA48 experiment. F. Costantini

The direct CP Violation measurement of the CERN NA48 experiment. F. Costantini The direct CP Violation measurement of the CERN NA48 experiment F. Costantini Pisa University and INFN - Italy Aspen Winter Conference, Jan. 2000 on behalf of the NA48 Collaboration: Cagliari Cambridge

More information

Gamma-Gamma Physics and Transition Form Factors with KLOE/KLOE-2

Gamma-Gamma Physics and Transition Form Factors with KLOE/KLOE-2 Gamma-Gamma Physics and Transition Form Factors with KLOE/KLOE- on behalf of the KLOE- Collaboration PhiPsi 017 June 6-9, 017 Mainz, Germany DAΦNE (Double Annular Φ Factory for Nice Experiments) + - e

More information

PoS(CHARM2016)074. Searches for CPV in D + decays at LHCb

PoS(CHARM2016)074. Searches for CPV in D + decays at LHCb Università di Pisa and Sezione INFN di Pisa, Pisa, Italy E-mail: simone.stracka@cern.ch Singly-Cabibbo-suppressed D + decays are a good place to search for CP violation in charm, (s which in the Standard

More information

Heavy Flavour Physics at the LHC. Lessons from the first phase of the LHC DESY 27 September 2012

Heavy Flavour Physics at the LHC. Lessons from the first phase of the LHC DESY 27 September 2012 Heavy Flavour Physics at the LHC University of Warwick and CERN Lessons from the first phase of the LHC DESY 27 September 2012 1 Outline Heavy flavour production at the LHC The LHCb experiment Selected

More information

Result on rare decays from NA62

Result on rare decays from NA62 Result on rare decays from NA62 FPCP 23/05/2013 Paolo Massarotti Università degli studi di Napoli Federico II And INFN Napoli On behalf of the NA62 collaboration: Birmingham, Bratislava, Bristol, CERN,

More information

V0 cross-section measurement at LHCb. RIVET analysis module for Z boson decay to di-electron

V0 cross-section measurement at LHCb. RIVET analysis module for Z boson decay to di-electron V0 cross-section measurement at LHCb. RIVET analysis module for Z boson decay to di-electron Outline of the presentation: 1. Introduction to LHCb physics and LHCb detector 2. RIVET plug-in for Z e+e- channel

More information