Measurement of the CP-violating phase phi_s in the decay Bs->J/psi phi

Details Measurement of the CP-violating phase phi_s in the decay Bs->J/psi phi Measurement of the CP-violating phase phi_s in the decay Bs->J/psi phi

2011-12-14

arxiv.org/abs/1112.3183v3

Phys. Rev. Lett. 108, 101803 (2012)

Physics

High Energy Physics

High Energy Physics - Experiment

9 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.108.101803

We present a measurement of the time-dependent CP-violating asymmetry in B_s -> J/psi phi decays, using data collected with the LHCb detector at the LHC. The decay time distribution of B_s -> J/psi phi is characterized by the decay widths Gamma_H and Gamma_L of the heavy and light mass eigenstates of the B_s-B_s-bar system and by a CP-violating phase phi_s. In a sample of about 8500 B_s -> J/psi phi events isolated from 0.37 fb^-1 of pp collisions at sqrt(s)=7 TeV we measure phi_s = 0.15 +/- 0.18 (stat) +/- 0.06 (syst) rad. We also find an average B_s decay width Gamma_s == (Gamma_L + Gamma_H)/2 = 0.657 +/- 0.009 (stat) +/- 0.008 (syst) ps^-1 and a decay width difference Delta Gamma_s == Gamma_L - Gamma_H} = 0.123 +/- 0.029 (stat) +/- 0.011 (syst) ps^-1. Our measurement is insensitive to the transformation (phi_s,DeltaGamma_s --> pi - phi_s, - Delta Gamma_s.

Affiliated with

Also associated with

No associations

Rating

Measurement of the CP-violating phase phi_s in the decay Bs->J/psi phi 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 Measurement of the CP-violating phase phi_s in the decay Bs->J/psi phi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measurement of the CP-violating phase phi_s in the decay Bs->J/psi phi will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-226369