# Measurement of the $B^{0}_{s}$ lifetime using semileptonic decays

Abstract : We report a measurement of the $B^0_{s}$ lifetime in the semileptonic decay channel $B^0_{s}\to D^-_s \mu^{+}\nu X$ (and its charge conjugate), using approximately 0.4 fb$^{-1}$ of data collected with the D0 detector during 2002 -- 2004. We have reconstructed 5176 $D^-_s \mu^{+}$ signal events, where the $D_s^-$ is identified via the decay $D_s^-\to \phi\pi^-$, followed by $\phi\to K^+ K^-$. Using these events, we have measured the $B^0_s$ lifetime to be $\tau(B^0_{s}) = 1.398 \pm 0.044$~$({stat}) ^{+0.028}_{-0.025}$ $({syst}) {ps}$. This is the most precise measurement of the $B_s^0$ lifetime to date.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00025989
Contributor : Sylvie Flores <>
Submitted on : Tuesday, April 25, 2006 - 1:20:10 PM
Last modification on : Wednesday, September 16, 2020 - 4:24:28 PM

### Citation

V.M. Abazov, B. Abbott, M. Abolins, B.S. Acharya, M. Adams, et al.. Measurement of the $B^{0}_{s}$ lifetime using semileptonic decays. Physical Review Letters, American Physical Society, 2006, 97, pp.241801. ⟨10.1103/PhysRevLett.97.241801⟩. ⟨in2p3-00025989⟩

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