Measurement of the Lifetime Difference in the B_s^0 System

Abstract

We present a study of the decay B_s^0 -> J/psi phi We obtain the CP-odd fraction in the final state at time zero, R_perp = 0.16 +/- 0.10 (stat) +/- 0.02 (syst), the average lifetime of the (B_s, B_sbar) system, tau (B_s^0) =1.39^{+0.13}_{-0.16} (stat) ^{+0.01}_{-0.02} (syst) ps, and the relative width difference between the heavy and light mass eigenstates, Delta Gamma/Gamma = (Gamma_L - Gamma_H)/Gamma =0.24^{+0.28}_{-0.38} (stat) ^{+0.03}_{-0.04} (syst). With the additional constraint from the world average of the B_s^0$lifetime measurements using semileptonic decays, we find tau (B_s^0)= 1.39 +/- 0.06 ~ps and Delta Gamma/Γ= 0.25^{+0.14}_{-0.15}. For the ratio of the B_s^0 and B^0 lifetimes we obtain tau(B_s^0)/tau(B^0)} = 0.91 +/- 0.09 (stat) +/- 0.003 (syst).

arXiv commentsubmitted to Phys. Rev. Lett. FERMILAB-PUB-05-324-E

References in corpus (6)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• High-Energy-Physics Event Generation with PYTHIA 6.1
• In Pursuit of New Physics with B_s Decays
• Measurement of the Lifetime Difference Between B_s Mass Eigenstates
• Extracting CKM Phases and $B_s-{\bar{B}}_s$ Mixing Parameters from Angular Distributions of Non-Leptonic B Decays
• Measurement of the B^0_s lifetime in the exclusive decay channel B^0_s -> J/psi phi

Cited by in corpus (7)

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• Lifetime Difference and CP-Violating Phase in the B_s^0 System
• Measurement of the charge asymmetry in semileptonic Bs decays
• Remarks on the $A_{SL}^s$ and $\Delta {\Gamma }_s$ Studies at the Tevatron and Beyond
• Observation of Bs to Psi(2S)phi and Measurement of Ratio of Branching Fractions B (Bs --> Psi(2S)phi) / B (Bs --> J/Psi phi)
• Review of Physics Results from the Tevatron: Heavy Flavor Physics
• Current Topics in D0 B Physics