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 / Adriani, O., Aguilarbenitez, M., Ahlen, S., Alcaraz, J., Aloisio, A., Alverson, G., Alviggi, M., Ambrosi, G., An, Q., Anderhub, H., Anderson, A.L., Andreev, V.P., Angelescu, T., Antonov, L., Antreasyan, D., Arce, P., Arefiev, A., Atamanchuk, A., Azemoon, T., Aziz, T., 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

ALOISIO, ALBERTO;ALVIGGI, MARIAGRAZIA;CHIEFARI, GIOVANNI;L. LISTA;MEROLA, LEONARDO;NAPOLITANO, MARCO;PATRICELLI, SERGIO;SCIACCA, CRISOSTOMO;
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
Measurement of the Average Lifetime of B-hadrons / Adriani, O., Aguilarbenitez, M., Ahlen, S., Alcaraz, J., Aloisio, A., Alverson, G., Alviggi, M., Ambrosi, G., An, Q., Anderhub, H., Anderson, A.L., Andreev, V.P., Angelescu, T., Antonov, L., Antreasyan, D., Arce, P., Arefiev, A., Atamanchuk, A., Azemoon, T., Aziz, T., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 317:(1993), pp. 474-484. [10.1016/0370-2693(93)91027-K]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/481280
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