First Year of BABAR/PEP-II - Harvard University Laboratory for ...

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DIRC Design ◆ 144 quartz bars. 1.7 cm thick, 4.9 m long. Arranged in 12 bar-boxes. ◆ Stand-off-box at the backward end contains 6 m 3 of purified water. ◆ 11,000 PMTs in 12 sectors. First Year of BaBar/PEP-II Masahiro Morii SLAC
DIRC Performance 240 220 200 180 160 140 120 100 80 60 40 20 0 BaBar Resolution: 3.0 mrad Bhabha events 810 820 830 840 850 860 Cherenkov Angle (mrad) Principle proven. More work needed to achieve σ = 2 mrad. ◆ Background from scattered photons. Association algorithm. First Year of BaBar/PEP-II Masahiro Morii SLAC
Page 1 and 2: First Year of BABAR/PEP-II — Meas
Page 3 and 4: Why CP Violation CP violation has b
Page 5 and 6: CKM Matrix Wolfenstein parametrizat
Page 7 and 8: Today’s Unitarity Triangle Top co
Page 9 and 10: CP Violation in the B system Consid
Page 11 and 12: J/ψ, ψ', ... c c b s B 0 d d Exam
Page 13 and 14: → sss and dds Modes b B 0 d s s s
Page 15 and 16: Experimental Challenges Exclusive r
Page 17 and 18: Experimental Challenges B flavor (B
Page 19 and 20: PEP-II Storage Ring ◆ High Energy
Page 21 and 22: First collision on May 26, 1999. PE
Page 23 and 24: BABAR Detector Instrumented Flux Re
Page 25 and 26: SVT Performance (µm) 60 40 SVT Hit
Page 27 and 28: Drift Chamber (DCH) 324 1015 1749 6
Page 29: DIRC: the PID Device Detector for I
Page 33 and 34: Electromagnetic Calorimeter (EMC) 9
Page 35 and 36: Instrumented Flux Return (IFR) ◆
Page 37 and 38: Are We Ready to Measure sin2β? PEP
Page 39 and 40: Candidates / 10 MeV/c 2 60 40 20 BA
Page 41 and 42: B 0 → J/ψ K S Reconstruction Com
Page 43 and 44: ◆ ∆E = E B CMS - B 0 → J/ψ K
Page 45 and 46: Data ~620 pb -1 Signal 41 events Ba
Page 47 and 48: D* Signal and Vertexing N events/20
Page 49 and 50: Extraction of sin2β We know how to

First Year of BABAR/PEP-II - Harvard University Laboratory for ...

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