Measurement of the Lifetime Difference in the B{sub s}{sup 0} System

Journal Article · Fri Oct 21 04:00:00 EDT 2005 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.95.171801· OSTI ID:20699461

Abazov, V M; Alexeev, G D; Kalinin, A M; Kharzheev, Y M; Malyshev, V L; Vertogradov, L S; Yatsunenko, Y A ^[1]; Abbott, B; Gutierrez, P; Hall, I; Jain, S; Kopal, M; Pompos, A; Severini, H; Skubic, P; Strauss, M; Zhang, X ^[2]; Abolins, M; Brock, R; Dyer, J ^[3]

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1. Joint Institute for Nuclear Research, Dubna (Russian Federation)
2. University of Oklahoma, Norman, Oklahoma 73019 (United States)
3. Michigan State University, East Lansing, Michigan 48824 (United States); and others

We present a study of the decay B{sub s}{sup 0}{yields}J/{psi}{phi}. We obtain the CP-odd fraction in the final state at time zero, R{sub perpendicular}=0.16{+-}0.10(stat){+-}0.02(syst), the average lifetime of the (B{sub s}{sup 0}, B{sub s}{sup 0}) system, {tau}(B{sub s}{sup 0})=1.39{sub -0.16}{sup +0.13}(stat){sub -0.02}{sup +0.01}(syst) ps, and the relative width difference between the heavy and light mass eigenstates, {delta}{gamma}/{gamma}{identical_to}({gamma}{sub L}-{gamma}{sub H})/{gamma}=0.24{sub -0.38}{sup +0.28}(stat){sub -0.04}{sup +0=} .{sup 03}(syst). With the additional constraint from the world average of the B{sub s}{sup 0} lifetime measurements using semileptonic decays, we find {tau}(B{sub s}{sup 0})=1.39{+-}0.06 ps and {delta}{gamma}/{gamma}=0.25{sub -0.15}{sup +0.14}. For the ratio of the B{sub s}{sup 0} and B{sup 0} lifetimes we obtain ({tau}(B{sub s}{sup 0})/{tau}(B{sup 0}))=0.91{+-}0.09(stat){+-}0.003(syst)

• OSTI ID: 20699461
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 17 Vol. 95; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B NEUTRAL MESONS
CP INVARIANCE
EIGENSTATES
J PSI-3097 MESONS
LIFETIME
MASS
SEMILEPTONIC DECAY