Measurement of Lifetime and Decay-Width Difference in B{sub s}{sup 0}{yields}J/{psi}{phi} Decays

Journal Article · Fri Mar 28 04:00:00 EDT 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.100.121803· OSTI ID:21123780

Aaltonen, T; Maki, T; Mehtala, P; Orava, R; Osterberg, K; Saarikko, H; Remortel, N van ^[1]; Abulencia, A; Budd, S; Ciobanu, C I; Errede, D; Errede, S; Gerberich, H; Grundler, U; Junk, T R; Kraus, J; Marino, C P; Neubauer, M S; Norniella, O; Pitts, K ^[2]

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1. Division of High Energy Physics, Department of Physics, University of Helsinki and Helsinki Institute of Physics, FIN-00014, Helsinki (Finland)
2. University of Illinois, Urbana, Illinois 61801 (United States)

We measure the mean lifetime {tau}=2/({gamma}{sub L}+{gamma}{sub H}) and the decay-width difference {delta}{gamma}={gamma}{sub L}-{gamma}{sub H} of the light and heavy mass eigenstates of the B{sub s}{sup 0} meson, B{sub sL}{sup 0} and B{sub sH}{sup 0}, in B{sub s}{sup 0}{yields}J/{psi}{phi} decays using 1.7 fb{sup -1} of data collected with the CDF II detector at the Fermilab Tevatron pp collider. Assuming CP conservation, a good approximation for the B{sub s}{sup 0} system in the standard model, we obtain {delta}{gamma}=0.076{sub -0.063}{sup +0.059}(stat){+-}0.006(syst) ps{sup -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 {delta}{gamma} are consistent with CP conservation.

• OSTI ID: 21123780
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 12 Vol. 100; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
APPROXIMATIONS
B NEUTRAL MESONS
EIGENSTATES
FERMILAB COLLIDER DETECTOR
FERMILAB TEVATRON
J PSI-3097 MESONS
LIFETIME
MASS
PARTICLE DECAY
PARTICLE PRODUCTION
PARTICLE WIDTHS
PHI MESONS
STANDARD MODEL