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 / Buskulic, D., de Bonis, I., Decamp, D., Ghez, P., Goy, C., Lees, J.P., Minard, M.N., Odier, P., Pietrzyk, B., Ariztizabal, F., Comas, P., Crespo, J.M., Efthymiopoulos, I., Fernandez, E., Fernandez Bosman, M., Gaitan, V., Garrido, L.l., Martinez, M., Mattison, T., Orteu, S., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 322:(1994), pp. 275-286. [10.1016/0370-2693(94)91120-7]

Measurement of the Bs0 lifetime

GREGORIO, ANNA;BOSISIO, LUCIANO;GIANNINI, GIANROSSANO;
1994-01-01

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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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/2563418
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