The lifetime of the Bs0 has been measured in a data sample of 8890000 hadronic events recorded with the ALEPH detector at LEP. After background subtraction 30.8 ± 6.9 events are attributed to the semileptonic decay of the Bs0 to a Ds− and an opposite-sign lepton. A maximum-likelihood fit to the distribution of the proper times of these events yields a Bs0 lifetime of τBs = 1.92−0.35+0.45 ± 0.04 ps.
Measurement of the Bs0 lifetime / ALEPH Collaboration;D. Buskulic;I. De Bonis;D. Decamp;P. Ghez;C. Goy;J. -P. Lees;M. -N. Minard;P. Odier;B. Pietrzyk. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - ELETTRONICO. - 322:(1994), pp. 275-286. [10.1016/0370-2693(94)91120-7]
Measurement of the Bs0 lifetime
FOCARDI, ETTORE;
1994
Abstract
The lifetime of the Bs0 has been measured in a data sample of 8890000 hadronic events recorded with the ALEPH detector at LEP. After background subtraction 30.8 ± 6.9 events are attributed to the semileptonic decay of the Bs0 to a Ds− and an opposite-sign lepton. A maximum-likelihood fit to the distribution of the proper times of these events yields a Bs0 lifetime of τBs = 1.92−0.35+0.45 ± 0.04 ps.
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