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Cherenkov Detector 144 quartz bars K, π, p separation
• Sensitive to C7 sign or new right-handed currents at low q2
BK(*)ℓℓ
Bl
l
s
q*K
lForward-backward asymmetry
383 million BB paper in preparation
K* longitudinal polarization
Leptonic B Decays
,H
at 90 % CL (1.2±0.4
stat±0.4
syst)x10-4
combination of semileptonic and hadronic tags
< 5.6x10-6 < 5.2x10-6
1x10-4 4x10-7 O(10-12)
B B Be
Allows extraction of fBVub (fB given Vub)
SM predictions
-Technique: Reconstruct one B meson as either -BDℓX (X = , 0 or nothing) -BDxhadthe other B is searched for Bℓ, ℓ = , e
-e,helicity suppressed-Possible enhancement due to New Physics-Bconstraint on the plane tanβ vs Higgs boson mass
PRD76,052002(2007)
PRD77,011107(2008)
at 90 % CL
ArXiv: 0801.0697
submitted to PRD
Charm Physics
• D mixing and CP violation:– Look for signs of new physics (x>>y or CP
violation)First evidence of D mixing in D0K+-
Decay modes under analysis: KS,KSKK,KK,,K3,K0
Limits on CP violation in KK, at O(0.1%) level
• Dalitz plot Analysis:– KS, KSKK, 0 are also important tools for
analysis
• Spectroscopy:– DsJ
* new resonances– New charm baryons– Measurements of spin
D0K+-: evidence of mixing at 3.9
. Best fit
+ :(,)No mixing
Contours at 1intervals
PRL 98:211802,2007
Fitted signal4030 88
physics B-factories are also tau factories!
-lifetime measurements tests of CPT, lepton universality
-decays with strange quarks very precise measurement of |Vus|, ms
new decay modes via resonance observed
high multiplicity hadronic states rich resonance sub-structures in 3/5 prong
decays limits on decaying into 7/8 pions
direct searches for New Physics lepton flavor violation, lepton number
violation baryon number violation CP violation in lepton sector
B()<6.8 x 10-8 @90%CLB(e)<1.1 x 10-7 @90%CLsearch for into 3 leptons decay on 3.42 x 108 e+e-+- eventsB(ℓℓℓ)<3.7-8.0 x 10-8 @90%CL
search for e on 2.07 x 108 e+e-+- events
K
PRL100:011801,2008
Large improvements comparedto PDG in many relevant channels
and many other hhh decays
– new states discovered; new interpretations
– improved measurements of resonance parameters
observation of enhanced Y(1S) for Y(4S): unexpected in ordinary
quarkonium picture.
• Interesting possibilities in bottomonium:– search for missing states;
– search for NP in Y(nS) decays.
J Y(3940)J/
B+
B0Combining BABAR and Belle: ~4 mass difference two X states?
DD
*
X(3872)
Important contributions:
Heavy-Quarkonium ResultsP
RD
77
, 0
11
10
2
arXiv:0711.2047
arX
iv:0
80
3.2
83
8
347/fb
383/fb
Moriond QCD
443/fb
347/fb
ee Interactions via Initial State Radiation ee ISR ee ISR ISR X X is any allowed final state ( JPC = 1) Radiator function W(s,s) known to <1% (ee X) measured as a function of mX = s ee interactions accessible from threshold up to ~5 GeV)'().,'()'( 0 sssWs
dx
d
s’
Measure both exclusive and inclusive cross sections Measure R(s) = had(s)/(s) hadronic contribution to (g-2) and QED(Z0) Form factors, spectroscopy, new states discovery (e.g. Y(4260))
K+K- K0
SK0L
K+K-K+K-K+K-
K+K-K0K
J/
62K+4 (2S)
s' [GeV]
R U
nit
s
pp
Published Results Analyses in Progress
DD*
Final Data Sample Total data collected until
September 2007:– 480M BB pairs,
– 630M cc events,
– 440M
Run 7 (Dec 07- Apr 08), collected:
– 30/fb at Y(3S) and
– 14/fb at Y(2S)
– Scan above the 4S
• Analysis of these data sets has started, results expected for summer'08
– Search for rare decays and detailed bottomonium spectroscopy