Springer LINK: The European Physical Journal C - Abstract Volume 2 Issue 3 (1998) pp 407-416

The European Physical Journal C

ISSN: 1434-6044 (printed version)
ISSN: 1434-6052 (electronic version)

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Abstract Volume 2 Issue 3 (1998) pp 407-416
DOI 10.1007/s100529800839

experimental physics:
A measurement of the $\mathrm{B_s^0}$ lifetime using reconstructed $\mathrm{ D_s^-}$ mesons

OPAL Collaboration , K. Ackerstaff et al. (8)

(8) CERN, European Organisation for Particle Physics, CH-1211 Geneva 23, Switzerland

Received: 25 July 1997 / Published online: 10 March 1998

Abstract. We report a measurement of the $\mathrm{B_s^0}$ meson lifetime from $\mathrm{B_s^0} \to \mathrm{ D_s^-} \rm{X}$ decays, where $\mathrm{ D_s^-}$ mesons are reconstructed in the $\mathrm{ D_s^-} \to \mathrm{\phi\pi^-}$ and $\mathrm{ D_s^-}\to\mathrm{K^{*0}K^-}$ decay channels. From approximately 3.7 million hadronic $\mathrm{Z}^0$ decays recorded by the OPAL detector at LEP a sample is selected containing 911 $\pm$ 83 candidates, of which $519 \pm 136$ are estimated to be from $\mathrm{B_s^0}$ meson decays. Fitting the distribution of the distance from the beam spot to the decay vertex of the $\mathrm{ D_s^-}$ candidates with an unbinned likelihood function we measure \[ \tau ({\rm B^0_{\rm s}} = 1.72^{+0.20+0.18}_{-0.19-0.17}\,{\rm ps}\; , \] where the errors are statistical and systematic, respectively.

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The European Physical Journal C

experimental physics: A measurement of the $\mathrm{B_s^0}$ lifetime using reconstructed $\mathrm{ D_s^-}$ mesons

experimental physics:
A measurement of the $\mathrm{B_s^0}$ lifetime using reconstructed $\mathrm{ D_s^-}$ mesons