Measurement of the Bs0 Lifetime in the Exclusive Decay Channel Bs0J/ψϕ

V. M. Abazov et al. (D0 Collaboration)
Phys. Rev. Lett. 94, 042001 – Published 2 February 2005

Abstract

Using the exclusive decay Bs0J/ψ(μ+μ)ϕ(K+K), we report the most precise single measurement of the Bs0 lifetime. The data sample corresponds to an integrated luminosity of approximately 220pb1 collected with the D0 detector at the Fermilab Tevatron Collider in 2002–2004. We reconstruct 337 signal candidates, from which we extract the Bs0 lifetime, τ(Bs0)=1.4440.090+0.098(stat)±0.020(sys)ps. We also report a measurement for the lifetime of the B0 meson using the exclusive decay B0J/ψ(μ+μ)K*0(892)(K+π). We reconstruct 1370 signal candidates, obtaining τ(B0)=1.4730.050+0.052(stat)±0.023(sys)ps, and the ratio of lifetimes, τ(Bs0)/τ(B0)=0.9800.071+0.076(stat)±0.003(sys).

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  • Received 22 September 2004

DOI:https://doi.org/10.1103/PhysRevLett.94.042001

©2005 American Physical Society

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Vol. 94, Iss. 4 — 4 February 2005

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