Flavour. Physics. With Other Facilities. A. Pich IFIC, Valencia

Transcription

1 Flavour Physics With Other Facilities A. Pich IFIC, Valencia 5 th Super B Workshop Paris, 9-11 May 2007

2 Flavour Structure of the Standard Model u ν e c νμ t ντ,, d e s μ b τ Why 3?? Pattern of masses Flavour Mixing CP Related to SSB Scalar Sector (Higgs) Kaon Factories : u, d, s τcf : c, τ, ν τ BF, SuperB : b, c, τ LC : νf : t, ν e, ν μ, ν τ

3 MuLan 2007 μ + ν μ τ 1 μ 2 5 GF m μ 3 = (1 + δqed ) 192π W ν e e + τ μ MuLan = (24) μs (11 ppm) ( Final Goal 1ppm ) δ QED knownto0.3 ppm (van-ritbergen & Stuart) μ/e separator kicker New World Average: τ μ = (21) μs G F = (6) x 10-5 GeV -2 (5 ppm)

4 τ ν τ 2 5 GF mτ 2 2 Γ( τ ντ lνl ) = f( m / ) 3 l mτ r 192π EW W e e, μ ν, ν μ f ( x) = 1 8x+ 8x x 12x log x r EW = (Marciano-Sirlin) B e Bμ τ = = τ ± ± ( ) 10 s ( B B ) e exp μ / = ±

5 τ τ, Br(τ μ), Br(τ e) 0.3% precision Future Improvements: BABAR, BELLE, KEDR, BESIII, SuperB, δm τ ~ MeV (12.7 ppm) BESIII τ 3π ν τ pseudomass m τ = ± MeV ± 0.32 MeV ± MeV 0.22 ± (PDG06) (BELLE) (KEDR) τ + τ Resonance Depolarization Method ± 0.14 BELLE

6 LEPTON UNIVERSALITY g g μ e g g μ τ

7 / g g τ μ K K W W e B B B τ μ τ τ π π μ τ μ τ μ τ τ Γ Γ Γ Γ ± ± ± ± / e g g μ K K K K W W e e e e e B B B B B B B B B B τ μ τ π μ π μ π μ π μ ± ± ± ± ± W W e B B B τ μ μ τ τ τ τ ± ± / e g g τ

8 Assuming Universality: V V us ud f f K π 2 2 mτ mπ Γ( τ ν K ) 1+ δ R τ τπ / = 2 2 = 0.267± mτ m K Γ( τ ντ π ) 1+ δ Rτ / K V V us ud f f K π mπ mμ m Γ( K ν ) 1 R K μ μ + δ π = = ± mk m μ mπ Γ( π νμ μ ) 1+ δ RK

9 Vij Determination (0-0 - ) Kπ l ν, DΚlν... d j V ij W u i e ν e suppressed Measure the q 2 distribution Measure Γ Get a theoretical prediction for Theory is always needed: Symmetries

10 Vud Superallowed Nuclear β Transitions ( ) Hardy-Towner-Savard PDG06 Revised Q[ 46 V] (2005) V ud = ± (Marciano Sirlin)

11 Neutron Decay: (Czarnecki Marciano Sirlin) PDG06: τ n = (885.7 ± 0.8) s, g A = ± T.M. Ito τ n = (878.5 ± 0.7 ± 0.3) s (Serebrov et al, 2005) PDG06 g A

12 Vud Summary Superallowed Nuclear β Transitions : V ud = ± Neutron Decay: Pion Decay: (PIBETA)

13 Kl3 Decays E865, ISTRA+, KLOE, KTEV, NA48 M. Moulson 07 FLAVIAnet Kaon WG K e3 Form Factor Slopes K μ3

14 J. Portolés O(p 4 ) Large O(p 6 ) ChPT correction (Bijnens-Talavera) O(p 6 )

15 Γ( K + μ + ν μ ) /Γ( π + μ + ν μ ) (Marciano 04) (Jamin-Oller-Pich 06) (MILC 06) (PDG 06)

16 R τ,s = Γ( τ ν τ S ) /Γ( τ ν τ e ν e ) kl s0 s s Rτ ( s0 ) ds 1 0 τ k 2 s0 m ds l dr τ δ R kl τ Rτ R m m 24 Δkl ( αs ) V kl kl 2 2, ud τ, S s ( τ ) m ud Vus τ Gámiz-Jamin-Pich-Prades-Schwab V = ± ± us exp th m = ± s ( 2GeV) 94 6 MeV Simultaneous m s & V us fit possible with better data The τ could give the most precise V us determination

17 Vus Summary K l3 : K μ2 / π μ2 : τ Decay: Hyperon Decay: V us = ± V ud + V us + V ub = ±

18 KLOE CPLEAR: < σ from NA48 Proposals to upgrade DAΦNE in Luminosity (and Energy)

19 NA48 Direct CP Slope Asymmetry -1.5 ± ± 1.8 First observation PDG 06: 2.45 ± 0.11 First measurement

20 K π ν ν T * 2 2 ( is i W ) ( ) F V V id, m / M νlγ μ νl π slγ μ dl K ( K πνν) ( KL π νν ) Br = (8.4 ± 1.0) 10 A η + (1.4 ρ) Br = (2.7 ± 0. 4) 10 A η Buras et al Long-distance contributions are negligible T 0 ( KL π νν) 0 CP BNL: few events! KEK-E391a: E391a: ( KL π νν ) New Experiments Needed ( K πνν) = ( ) Br Br < (90% C.L.)

21 Future Kaon Initiatives CERN-SPS Rare K decays LFV Chiral dynamics Φ factory Hadron xsec K S decays, interferometry U-70 Frequent K decays J-PARC Λ Ξ hypernuclei K Rare Decay A. Ceccucci NA48/ kaon decays P-326 (NA48/3) > kaon decays Δ[Br(K + π + νν)] ~ 0.10

22 Plans for K + π + νν J-PARC: LoI ; plans to use the BNL-E949 detector CERN: P-326 ; about 80 SM events in two years Plans for K L π 0 νν KEK: E391a ; data taking completed (three runs) Present limit < % CL (10% of Run-1 data) Aims to reach the Grossman-Nir bound (~10-9 ) J-PARC: proposal (>2010) Step I: E391a detector at J-PARC ~ SM sensitivity Step II: New detector & dedicated beam-line ~ 100 SM events CERN: would need an upgraded proton complex

23 K. Komatsubara K L π 0 l + l Plenty of Room for New Physics

24 Dsig e + ψ(3770) Analysis Strategy e + e - ψ(3770) DD e D tag ψ(3770) is to charm what Y(4S) is to beauty π K + Pure DD, no additional particles (E D = E beam ). σ (DD) = 6.4 nb (Y(4S)->BB ~ 1 nb) Low multiplicity ~ 5-6 charged particles/event high tagging efficiency: ~22% of D s Compared to ~0.1% of B s at the Y(4S) A little luminosity goes a long way: # events in 100 pb charm factory with 2D s reconstructed ~ # events in 500 fb Y(4S) with 2B s reconstructed π + π π + ψ (3770) D D K π + π, D D K K CLEO-c DATA π π + Charm 2006 June Beijing Charm Perspective Ian Shipsey

25 D s Absolute Hadronic Br s CLEO-c D 0 D +

26 I. Danko (La Thuile 07) arxiv:

27 SEMILEPTONIC DECAYS V cs, V cd f(0) th f q 2 ( )/ f(0) f q 2 ( )/ f(0) 0 + D K l ν e 0 + D K e ν e Important Tests of Non-Perturbative QCD Tools Relevant to Improve Predictions for B s

28 RARE DECAYS CLEO-c c l + d, s u ν l Branching Fraction D. Asner I. Shipsey GIM, FCNC, virtual loops, Sensitive to New Physics

29 D 0 D 0 MIXING c d, s u c d, s u d, s u d, s c u c H. Nelson, A.A. Petrov Intermediate down-type quarks b contribution negligible (~1%) ΔM ~ [SU(3) Breaking] 2 Very sensitive to long-distance effects CP CP very suppressed in the SM : unambiguous signal of New Physics x, SM y, SM x, BSM

30 D. Asner 1.12 ± 0.32 y CP = y cos φ + x Δ sin φ y x' = x cos δ + y sin δ CP y' = y cos δ -x sin δ

31 D 0 D 0 MIXING x = ( ) 10 3 y = ( ) 10 3 D. Asner 5σ contour excludes x=y=0 cosδ =1.09 ± 0.66 x = (8.5 ) y = (6.3 ) 10 cosδ =1.0 ± 0.1

32 SEARCHES FOR CP IN D DECAYS Direct CP I. Shipsey Strong phase-shifts needed Non-perturbative uncertainties SM Expectations: A CP 0.1% in SCS, negligible in CA & DCS Larger Signals New Physics

33 BESIII Threshold Advantages (Systematics & Backgrounds) Event statistics Physics Channel Energy (GeV) Luminosity (10 33 cm 2 s 1 ) Events/year J/ψ τ ψ D* Ds Ds

34 m ν 0 NEW PHYSICS Neutrino ν μ ν τ Oscillations ν e ν μ Weinberg: cij t c 1 c L SSB iφφ Lj + h.c. νilmijνjl + h.c. ; Mij Λ 2 c ij Λ v 2 m ν > 0.05 ev Λ / c ij < GeV Lepton Number Violation. Lepton Mixing. Leptonic CP Leptogenesis Baryogenesis

35 LEPTON FLAVOUR VIOLATION 90% CL Upper Limits on Br(l X ) [BABAR / BELLE] Decay U.L. Decay U.L. Decay U.L. μ e γ μ e e + e μ e γγ τ e γ τ e e + e τ e e + μ τ μ γ τ e μ + μ τ μ e + μ τ e e μ τ μ μ + μ τ e π τ μ π τ e η τ μ η τ e η τ μ η τ e Κ * τ e Κ S τ μ Κ S τ μ ρ τ e K + K τ e K + π τ e π + K τ μ K + K τ μ K + π τ μ π + K τ e π + π τ μ π + π τ Λπ τ e + K K τ e + K π τ e + π π τ μ + K K τ μ + K π τ μ + π π

36 MEG: Br(μeγ) ~ Prism: Pr(μe) ~ SuperB: Br(τ µγ) ~ 10-9 M.J. Herrero M. Blanke et al, LHT

37 G. Isidori Minimal Lepton Flavour Violation

38 CP in τ Decays Blind Search for New Physics τ ν τ K 0 π, ν τ K π 0 Two Interfering Amplitudes (Dalitz Plot) SM Strong Phase can be determined I.M. Nugent Jamin-Pich-Portolés B. Schwartz

39 Huge statistics Non-b shopping list : Lepton Flavour Violation studies CP in the charm sector FCNC & Rare D decays Universality & Lorentz structure of weak decays (τ) First hints on leptonic CP

40 Backup Slides

41 D. Asner

42 KTeV H. Nguyen (Moriond 07)