Measurement of Lifetime and Decay-Width Difference in B_{s};{0}-->J/psivarphi Decays.

Journal article

We measure the mean lifetime tau=2/(Gamma_{L}+Gamma_{H}) and the decay-width difference DeltaGamma=Gamma_{L}-Gamma_{H} of the light and heavy mass eigenstates of the B_{s}{0} meson, B_{sL}{0} and B_{sH}{0}, in B_{s}{0}-->J/psivarphi decays using 1.7 fb;{-1} of data collected with the CDF II detector at the Fermilab Tevatron pp[over ] collider. Assuming CP conservation, a good approximation for the B_{s}{0} system in the standard model, we obtain DeltaGamma=0.076_{-0.063}{+0.059}(stat)+/-0.006(syst) ps{-1} and tau=1.52+/-0.04(stat)+/-0.02(syst) ps, the most precise measurements to date. Our constraints on the weak phase and DeltaGamma are consistent with CP conservation.

Authors: Aaltonen, T; Abulencia, A; Adelman, J; Akimoto, T; Albrow, MG

• Publication status: Published
• Journal: Physical Review Letters
• Volume: 100
• Issue: 12
• Pages: 121803
• Publication date: 2008-03-01
• DOI: 10.1103/physrevlett.100.121803
• EISSN: 1079-7114
• ISSN: 0031-9007
• Language: English
• Keywords: CDF Collaboration