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A Measurement of the tau leptonic branching fractions
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| DELPHI Collaboration; Castillo Giménez, María Victoria Perfil; Ferrer Soria, Antonio Perfil; Higón Rodríguez, Emilio Perfil; Chrin, J. T. M.; Cortina Gil, Eduardo; Ferrer Soria, Antonio Perfil; Fuster Verdú, Juan A. Perfil; García García, Carmen Perfil; Gómez Cadenas, Juan José Perfil; Hernández Rey, Juan José Perfil; Hernando Morata, José Ángel; Lacasta Llácer, Carlos; Lozano Bahilo, José Julio; Martínez Vidal, Fernando Perfil; Martí García, Salvador; Navas Concha, Sergio; Salt Cairols, José Perfil; Valls Ferrer, Juan Antonio | |||
| This document is a artículoDate1995 | |||
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Este documento está disponible también en : http://dx.doi.org/10.1016/0370-2693(95)00987-V |
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Este documento está disponible también en : http://hdl.handle.net/10550/34772 |
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| A sample of 25000 \Z\rightarrow\tt events collected by the DELPHI experiment at LEP in 1991 and 1992 is used to measure the leptonic branching fractions of the \tau lepton. The results are B(\TEL) = (17.51 \pm 0.39)\% and B(\tau\rightarrow \mu\nu\bar{\nu}) = (17.02 \pm 0.31)\%. The ratio of the muon and electron couplings to the weak charged current is measured to be g_{\mu}/g_{e} = 1.000 \pm 0.013, satisfying e-\mu universality. The average leptonic branching fraction corrected to the value for a massless lepton, assuming e-\mu universality, is found to be B(\tau\rightarrow l \nu\bar{\nu}) = (17.50 \pm 0.25)\%. | |||
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DELPHI Collaboration Castillo Giménez, María Victoria Ferrer Soria, Antonio Higón Rodríguez, Emilio 1995 A Measurement of the tau leptonic branching fractions Physics Letters B 357 4 715 724 |
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| http://dx.doi.org/10.1016/0370-2693(95)00987-V |
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22 - Física [3310]