Moriond EW, 3 Mar 200 8 Tagir Aushev (EPFL, ITEP) 1 B → K S 0 0 B → K S K S B K → S 0 B → D *+ D *- B → a 1 , a 1 K, b 1 , b 1 K... (4S) B → CP B CP Measurements of φ 1 and φ 2 Tagir Aushev For the Belle Collaboration (EPFL, Lausanne ITEP, Moscow)
Measurements of φ 1 and φ 2. B → K S p 0 p 0 B → K S K S B → K S p 0 B → D *+ D *- B → a 1 p , a 1 K, b 1 p , b 1 K... U (4S) → B CP B CP. Tagir Aushev For the Belle Collaboration (EPFL, Lausanne ITEP, Moscow). CKM matrix & unitary triangle. relative - PowerPoint PPT Presentation
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Moriond EW, 3 Mar 2008 Tagir Aushev (EPFL, ITEP) 1
B → KS 0 0
B → KS KS
B → KS 0
B → D*+ D*-
B → a1 , a1K, b1 , b1 K...(4S) → BCP BCP
Measurements of φ1 and φ2
Tagir AushevFor the Belle Collaboration
(EPFL, LausanneITEP, Moscow)
Moriond EW, 3 Mar 2008 Tagir Aushev (EPFL, ITEP) 2
† *1 0ud cd cbV V V V V *ubV tdV *
tbV
,
0,1
0,0
ud
cd cb
V
V V
*ubV tb
cd cb
V
V V
tdV
*
*
* *
* *arg , arg , argtd ubtb cd cb ud
ud tub td b cd cb
V V
V V
V V V V
V V V V
relative
magnitudes
CKM matrix & unitary triangle
Moriond EW, 3 Mar 2008 Tagir Aushev (EPFL, ITEP) 3
CP Violationin the Standard Model
• Triangle is well measured• φ1() mainly from B0→J/Ψ KS “golden mode”• Smaller and smaller room for the vertex position, but it is still in• New decay modes are examining to find a New Physics
Moriond EW, 3 Mar 2008 Tagir Aushev (EPFL, ITEP) 4
TCPV measurement on B-factory
B’s are produced in a boosted frame t is measured from vertex positions
B’s are entangled flavor of B1 at time t2 is determined by B2 decay
Moriond EW, 3 Mar 2008 Tagir Aushev (EPFL, ITEP) 5
8GeV (e-) 3.5GeV (e+)
Silicon Vertex Tracker
5-layer, double-sided strips
Drift Chamber40-layer, small
cell
DIRC (PID)quartz
Cherenkov detector
EM CalorimeterCsI crystals
Flux ReturnRPC and
LST instrument
ed iron
1.5 TSolenoi
d
Belle & BaBar B-factories
Moriond EW, 3 Mar 2008 Tagir Aushev (EPFL, ITEP) 6
BaBar collected 510 fb-1
Lpeak
=1.71×1034cm−2 s−1
∫Ldt=770 fb−1
Current luminosities
Moriond EW, 3 Mar 2008 Tagir Aushev (EPFL, ITEP) 7
BD(0,+)D0
After evidence for DCPV in BD-
D+ recently shown by Belle all BDD decays has a special interest
B.R. and charge asym for BD+D0 were updated by Belle: