The average lifetime of b hadrons has been measured using the L3 detector at LEP, running at square-root s almost-equal-to M(Z). A b-enriched sample was obtained from 432 538 hadronic Z events collected in 1990 and 1991 by tagging electrons and muons from semileptonic b hadron decays. From maximum likelihood fits to the electron and muon impact parameter distributions, the average b hadron lifetime was measured to be tau(b) = (1535 +/- 35 +/- 28) fs, where the first error is statistical and the second includes both the experimental and the theoretical systematic uncertainties.

Measurement of the Average Lifetime of B-hadrons / O. ADRIANI, M. AGUILARBENITEZ, S. AHLEN, J. ALCARAZ, A. ALOISIO, G. ALVERSON, M. G. ALVIGGI, G. AMBROSI, Q. AN, H. ANDERHUB, A. L. ANDERSON, V. P. ANDREEV, T. ANGELESCU, L. ANTONOV, D. ANTREASYAN, P. ARCE, A. AREFIEV, A. ATAMANCHUK, T. AZEMOON, T. AZIZ, et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 317:(1993), pp. 474-484. [10.1016/0370-2693(93)91027-K]

Measurement of the Average Lifetime of B-hadrons

ADRIANI, OSCAR;D'ALESSANDRO, RAFFAELLO;M. LENTI;
1993

Abstract

The average lifetime of b hadrons has been measured using the L3 detector at LEP, running at square-root s almost-equal-to M(Z). A b-enriched sample was obtained from 432 538 hadronic Z events collected in 1990 and 1991 by tagging electrons and muons from semileptonic b hadron decays. From maximum likelihood fits to the electron and muon impact parameter distributions, the average b hadron lifetime was measured to be tau(b) = (1535 +/- 35 +/- 28) fs, where the first error is statistical and the second includes both the experimental and the theoretical systematic uncertainties.
1993
317
474
484
O. ADRIANI;M. AGUILARBENITEZ;S. AHLEN;J. ALCARAZ;A. ALOISIO;G. ALVERSON;M. G. ALVIGGI;G. AMBROSI;Q. AN;H. ANDERHUB;A. L. ANDERSON;V. P. AN...espandi
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/772795
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