The lifetimes of the B0BAR and B- mesons have been measured with the ALEPH detector at LEP. Semileptonic decays of B0BAR and B- mesons were partially reconstructed by identifying events containing a lepton with an associated D*+ or D0 meson. The proper time of the B meson was estimated from the measured decay length and the momentum and mass of the D-lepton system. A fit to the proper time of 77 D*+l- and 77 D0l- candidates, combined with a constraint on the lifetime ratio (tau-/tau0) arising from the relative rates of observed D*+l- and D0l- events, yielded the following lifetimes: tau0 = 1.52(+0.20/-0.18) (stat. )+0.07/-0.13 (syst.) ps, tau = 1.47(+0.22/-0.19) (stat.)+0.15/-0.14 (syst.) ps, tau-/tau0 = 0.96(+0.19/-0.15) (stat. )+0.18/-0.12(syst.).

Measurement of the B0 and B- meson lifetimes / Buskulic, D., Decamp, D., Goy, C., Lees, J.p., Minard, M.n., Mours, B., Pietrzyk, B., Alemany, R., Ariztizabal, F., Comas, P., Crespo, J.m., Delfino, M., Fernandez, E., Fernandezbosman, M., Gaitan, V., Garrido, L., Mattison, T., Pacheco, A., Padilla, C., Pascual, A., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 307:1-2(1993), pp. 194-208. [10.1016/0370-2693(93)90211-Y]

Measurement of the B0 and B- meson lifetimes

CREANZA, Donato Maria;IASELLI, Giuseppe;MAGGI, Giorgio Pietro;
1993

Abstract

The lifetimes of the B0BAR and B- mesons have been measured with the ALEPH detector at LEP. Semileptonic decays of B0BAR and B- mesons were partially reconstructed by identifying events containing a lepton with an associated D*+ or D0 meson. The proper time of the B meson was estimated from the measured decay length and the momentum and mass of the D-lepton system. A fit to the proper time of 77 D*+l- and 77 D0l- candidates, combined with a constraint on the lifetime ratio (tau-/tau0) arising from the relative rates of observed D*+l- and D0l- events, yielded the following lifetimes: tau0 = 1.52(+0.20/-0.18) (stat. )+0.07/-0.13 (syst.) ps, tau = 1.47(+0.22/-0.19) (stat.)+0.15/-0.14 (syst.) ps, tau-/tau0 = 0.96(+0.19/-0.15) (stat. )+0.18/-0.12(syst.).
1993
https://www.sciencedirect.com/science/article/pii/037026939390211Y?via%3Dihub
Measurement of the B0 and B- meson lifetimes / Buskulic, D., Decamp, D., Goy, C., Lees, J.p., Minard, M.n., Mours, B., Pietrzyk, B., Alemany, R., Ariztizabal, F., Comas, P., Crespo, J.m., Delfino, M., Fernandez, E., Fernandezbosman, M., Gaitan, V., Garrido, L., Mattison, T., Pacheco, A., Padilla, C., Pascual, A., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 307:1-2(1993), pp. 194-208. [10.1016/0370-2693(93)90211-Y]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/4258
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