Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2000-11-07
Physics
High Energy Physics
High Energy Physics - Experiment
19 pages, 10 postscript figures, contributed to the Proceedings of ICHEP2000
Scientific paper
We present a preliminary measurement of time-dependent CP-violating asymmetries in B^0-->J/psi K_S and B^0-->psi(2S) K_S decays recorded by the BABAR detector at the PEP-II asymmetric B Factory at SLAC. The data sample consists of 9.0 fb-1 collected at the Upsilon(4S) resonance and 0.8 fb-1 off-resonance. One of the neutral B mesons, produced in pairs at the Upsilon(4S), is fully reconstructed. The flavor of the other neutral B meson is tagged at the time of its decay, mainly with the charge of identified leptons and kaons. The time difference between the decays is determined by measuring the distance between the decay vertices. Wrong-tag probabilities and the time resolution function are measured with samples of fully-reconstructed semileptonic and hadronic neutral B final states. The value of the asymmetry amplitude, sin(2*beta), is determined from a maximum likelihood fit to the time distribution of 120 tagged B^0-->J/psi K_S and B^0-->psi(2S) K_S candidates: sin(2*beta) = 0.12+/-0.37(stat)+/-0.09(syst).
No associations
LandOfFree
First CP Violation Results from BABAR does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with First CP Violation Results from BABAR, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and First CP Violation Results from BABAR will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-465894