The lifetimes of the View the MathML source and B− mesons have been measured with the ALEPH detector at LEP. Semileptonic decays of View the MathML source and B− mesons were partially reconstructed by identifying events containing a lepton with an associated View the MathML source 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 (View the MathML source) arising from the relative rates of observed D∗+ℓ− and D0ℓ− events, yielded the following lifetimes: View the MathML source.

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

Measurement of the B0 and B− meson lifetimes

FOCARDI, ETTORE;
1993

Abstract

The lifetimes of the View the MathML source and B− mesons have been measured with the ALEPH detector at LEP. Semileptonic decays of View the MathML source and B− mesons were partially reconstructed by identifying events containing a lepton with an associated View the MathML source 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 (View the MathML source) arising from the relative rates of observed D∗+ℓ− and D0ℓ− events, yielded the following lifetimes: View the MathML source.
1993
307
194
208
D. Buskulic;D. Decamp;C. Goy;J.-P. Lees;M.-N. Minard;B. Mours;B. Pietrzyk;R. Alemany;F. Ariztizabal;P. Comas;J.M. Crespo;M. Delfino;E. Fe...espandi
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/638310
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