RECENT RESULTS FROM. 1 Recent Results From BABAR
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1 RECENT RESULTS FROM BABAR 1 Recent Results From BABAR
2 2 Recent Results From BABAR
3 Canadian Collaborators in BaBar University of British Columbia Asgeirsson, David J. Bruskiewich, Patrick S. De Silva, Asoka Donszelmann, Tulay Fulsom, Bryan Hearty, Christopher Mattison, Tom McKenna, Janis Mcgregor, Grant D. Universite de Montreal Brunet, Sylvie Cote, David Sicard, Marie-Elisabeth Simard, Martin Taras, Paul Viaud, Benoit Francis Faculty RA/PostDoc Student McGill University Campbell, Benjamin C. Harnois-Deraps, Joachim Kim, Hojeong Klemetti, Miika A. Mclachlin, Sheila Patel, Popat M. Robertson, Steven H. University of Victoria Agarwal, Ashok K. Banerjee, Swagato Bhuyan, Bipul Choi, Herve H. F. Hamano, Kenji King, Gregory J. Kowalewski, Robert Lewczuk, Mateusz J. Nugent, Ian M. Roney, Michael Sobie, Randall J. In this session 3 Recent Results From BABAR
4 Outline BaBar is more than a B-Factory: B σ(bb:cc: (bb:cc:ττ)) = 1.1 : 1.3 : 0.9 nb In this talk: CP violation in B system b a g Charm Spectroscopy X (3872) Y (4260) t Physics Lepton Flavour Violation 4 Recent Results From BABAR
5 Outline - - BaBar is more than a B-Factory: B - σ(bb:cc: (bb:cc:ττ)) = 1.1 : 1.3 : 0.9 nb In this talk: CP violation in B system b a g Charm Spectroscopy X (3872) Y (4260) * VubV V V cd ud * cb (ρ,η) α V V γ β (0,0) (1,0) V * tb cd V td * cb t Physics Lepton Flavour Violation 5 Recent Results From BABAR
6 CP Violation in Standard Model CKM Matrix (V): Mass eigenstates -> Flavour eigenstates 3x3 Unitary Matrix has 1 Complex Phase => CP violation magnitudes d s b phases d s b u c u c t t V V = 1 => The Unitarity Triangle (ρ,η) * * VV α VV ub ud tb td * * * Vud Vub + Vcd Vcb + VtdVtb = 0 * * VV VV cd cb cd cb γ β (0,0) (1,0) 6 Recent Results From BABAR
7 CP Violation in several variants B 0 -B 0 mixing factor in CPV: * * (with final state as CP eigenstate) 7 Recent Results From BABAR
8 CPV : Time Dependent Analysis Coherent B meson production (L=1) 0 B rec µ J /ψ + + µ 0 K S π π Exclusive B meson reconstruction B tag = 0 B t () 0 B tag z ~260µ m 0 Brec = B () t σ ( z ) 170µ m t z / < βγ > c βγ = 0.56 (PEP II) K l B-Flavor Tagging Quality: Q=ε(1-2ω) 2 = (30.5 ±0.5)% A CP () t = N B t f N B t f 0 0 ( () CP) ( () CP ) 0 0 ( () CP) + ( () CP ) N B t f N B t f = S sin( mt) C cos( mt) f f 8 Recent Results From BABAR
9 The angle beta Tree dominance 0 B b d W c c s d J/ ψ s d d s 0 K t,c,u 0 K B b u,d W internal penguin g s s s u,d Penguin dominance φ K B b g t,c,u W s s s u,d u, d flavour-singlet penguin φ K 9 Recent Results From BABAR
10 Independent measurements of ß Important to check (in-)consistencies in different measurements When only one diagram contributes to the final state Interferring C f = 0 A CP (t) = ± Imλ sin( mt) Amplitudes S f = Im λ = Sin(2β) Sin (2β eff ) 10 Recent Results From BABAR
11 sin2β from B 0 charmonium K 0 Latest measurement (cc) K S (CP odd) modes J/y K L (CP even) mode sin 2β = 0.722± 0.040± BABAR [PRL94, (2005), 227MBB]: 11 Recent Results From BABAR
12 sin2β from b ccd : summary UPDATE hep-ex/ , 232MBB Results consistent with SM expectation 12 Recent Results From BABAR
13 Sin2β eff in b s Penguins Search for New Physics in the loop B ( φ, η, ρ, ω, f0, π, π π, K K, KS KS ) K.. look for deviations of sin2β from 0 New Results from BaBar: First measurement of rk S Update in ωk S Pure Penguin mode: B K S K S K S - No charged tracks from decay vertex: extrapolate back the K S s take advantage of the small beam size in the transverse plane Many BF and A CP measurements in related modes control hadronic uncertainties in b s penguins. Phys.Rev.D73:071102,2006 B h h, (h,h)p 0 : Useful in reducing (by ~20%) theory uncertainty in sin2β(η K S ) 13 Recent Results From BABAR
14 Summary of sin(2β) in Penguins Results New Physics? Naïve 2 Average: 0.50 ± 0.06 (2.8σ) Representative theory estimates ρk S Dsin2b Example from recent calculations (QCD factorization) 2-body: [Beneke; PL B620, 143 (2005)] 14 Recent Results From BABAR 3-body: [Cheng,Chua,Soni; PRD72, (2005)]
15 The angle alpha 2 body isospin analyses of B ππ and B ρρ (discrete ambiguities) Dalitz plot analysis of B ρπ (no ambiguity) New BaBar measurement of ρ + ρ 0 : hep-ex/ Recent Results From BABAR
16 Three Methods: GLW (Gronau, London, Wyler) ADS (Atwood, Dunietz, Soni) AD ( f) The angle gamma Use interference between B DK and B DK with both 0 0 D and D decaying Phys.Rev.D73 (2006) , 232M BB : doubly Cabibbo suppressed Need more data Dalitz (Giri, Grossman, Soffer, Zupan) Currently most sensitive to the New from BaBar: D 0 fi K S w, K S f same final state f 16 Recent Results From BABAR
17 Evolution of Errors 1s CKM fit 2s s(sin2b) in penguins sin(2β )[( cc) K 0 ] +1σ Current Br(ρ 0 ρ 0 ) -1σ Error on g Error on a 17 Recent Results From BABAR
18 Outline BaBar is more than a B-Factory: B σ(bb:cc: (bb:cc:ττ)) = 1.1 : 1.3 : 0.9 nb In this talk: CP violation in B system b a g Charm Spectroscopy X (3872) Y (4260) t Physics Lepton Flavour Violation 18 Recent Results From BABAR
19 Outline BaBar is more than a B-Factory: B σ(bb:cc: (bb:cc:ττ)) = 1.1 : 1.3 : 0.9 nb In this talk: CP violation in B system b a g Y(4260)? S/P? X(3872)? Charm Spectroscopy X (3872) Y (4260) t Physics Lepton Flavour Violation T.Barnes, S.Godfrey and E.S.Swanson Phys.Rev. D (2005) 19 Recent Results From BABAR
20 X(3872) J/ψ π + π New Physics! Observed by Belle (2003), confirmed by CDF, DØ, BABAR N=61.2±15.3 (6.1σ) B ± only = B ( B K X (3872 ), X (3872 (10.1 ± ) PRD 73 (2006) , 232M BB π + π J ψ 2.5 ± 1.0) 10 ) 6 m Γ X X Combined Average : = ( ± 0.6) MeV/c < % CL 2 B( B B( B No charged partner observed Initial state X 0 (3872) isospin = 0 K K ± X (3872)) < 5 10 X (3872), X ± 0 m 4 0 m 90%CL 0 π ± π J ψ ) BABAR: 232M BB PRL 96, (2006) < %CL 20 Recent Results From BABAR 6 BABAR: 234M BB PRD 71, (2005)
21 N=19±6 (3.4σ) X(3872) 287M BB B( B J/ψ g K X (3872) X (3872) γ = (3.4 ± 1.0 ± 0.3) 10 6 J ψ ) Confirms 4σ evidence from Belle C(J/ψ)=-1, C(γ)=-1 X(3872) is a C=+1 state [π + π - ] similar to γ I G (J PC )[π + π - ] = 1 + (1 -- ) : ρ 0 Isospin (J/ψ) = 0 Isospin (J/ψ π + π - ) = 1 X(3872) π + π - J/ψ isospin-violating decay Explains narrow width of X(3872) All (other) evidence I=0, J PC =1 ++ for X(3872) 21 Recent Results From BABAR
22 Y(4260) J/ψ p + p New Physics! Searching for X(3872) in ISR events but found Y(4260) 233 fb-1, PRL 95, (2005) J PC = 1 y(2s) events 8 s Significance Γ Y ee B( Y (4260) π = (5.5 ± π ) ev J ψ ) Confirmed by CLEO in energy scan (also in π 0 π 0 J/ψ mode) hep-ex/ m Γ Y Y BABAR: 232 fb -1 PRD 73, (2006) Peak cross section: σ(e + e - Y)=(51±12) pb = (4259 ± 8 = (88 ± ) ) MeV/c MeV 2 22 Recent Results From BABAR
23 Y(4260) Searches in ISR Processes e + e γ ISR DD (289 fb -1 ) To.b.subm.to PRL e + e γ ISR φp + p (232 fb -1 ) To.b.subm.to PRD e + e γ ISR pp, (232 fb 1 ) PRD 73, (2006)?(3770) M(K + K - ) Y(4260) BF( Y(4260) DD) BF( Y(4260) J / ψπ < 7.6(95% CL) + π ) Γ Y ee B( Y (4260) π < % CL + π φ) B( Y (4260) pp) + B( Y (4260) π π J ψ < 90% CL ) g ISR detection not required g ISR detected g ISR detected 23 Recent Results From BABAR
24 Indication of Y(4260) in B decays 211 fb -1 PRD 73, (2006) 3.1σ significance, assuming mass and width from ISR analysis; needs confirmation BF(B ± Y(4260) K ±, Y(4260) π + π - J/ψ= (2.0±0.7±0.2) Recent Results From BABAR
25 Outline BaBar is more than a B-Factory: B σ(bb:cc: (bb:cc:ττ)) = 1.1 : 1.3 : 0.9 nb In this talk: CP violation in B system b a g Charm Spectroscopy X (3872) Y (4260) t Physics Lepton Flavour Violation 25 Recent Results From BABAR
26 Outline BaBar is more than a B-Factory: B σ(bb:cc: (bb:cc:ττ)) = 1.1 : 1.3 : 0.9 nb In this talk: CP violation in B system b a g SM(n mixing) ~ Charm Spectroscopy X (3872) Y (4260) t Physics Lepton Flavour Violation 26 Recent Results From BABAR
27 Outline BaBar is more than a B-Factory: B σ(bb:cc: (bb:cc:ττ)) = 1.1 : 1.3 : 0.9 nb In this talk: CP violation in B system b a g Charm Spectroscopy X (3872) Y (4260) SM(n mixing) ~ New Physics ~ t Physics Lepton Flavour Violation 27 Recent Results From BABAR
28 Lepton Flavour Violating τ decays 28 Recent Results From BABAR
29 (τ µ γ) and S φks New Physics? 6 29 Recent Results From BABAR
30 Summary Last week the BaBar collaboration celebrated a major milestone: the submission of its 200 th paper We have become a b-factory, a tau-factory and a charm-factory (SLAC Press Release, May 2006). BaBar papers by area: BaBar expects to double its data statistics over the next 2 years. Please stay tuned for many more exciting results. 30 Recent Results From BABAR
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