The lifetime of the B(s)0 has been measured in a data sample of 889 000 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 B(S)0 to a D(S)- and an opposite-sign lepton. A maximum-likelihood fit to the distribution of the proper times of these events yields a B(s)0 lifetime of tau(B)s = 1.92 (-0.35)+0.45 +/- 0.04 ps.

Measurement of the B(s)o Lifetime / Focardi, E., Debonis, 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., Fernandezbosman, M., Gaitan, V., Garrido, 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 B(s)o Lifetime

FOCARDI, ETTORE;CIULLI, VITALIANO;
1994

Abstract

The lifetime of the B(s)0 has been measured in a data sample of 889 000 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 B(S)0 to a D(S)- and an opposite-sign lepton. A maximum-likelihood fit to the distribution of the proper times of these events yields a B(s)0 lifetime of tau(B)s = 1.92 (-0.35)+0.45 +/- 0.04 ps.
1994
322
275
286
Focardi, Ettore; Debonis, I.; Decamp, D.; Ghez, P.; Goy, C.; Lees, J. P.; Minard, M. N.; Odier, P.; Pietrzyk, B.; Ariztizabal, F.; Comas, P.; Crespo, ...espandi
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/770608
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