The process e+e-→, where l is a charged or a neutral lepton and f any charged fermion, is analyzed. The study uses the ALEPH data collected at LEP from 1989 to 1993 at centre-of-mass energies between 88 and 95 GeV, corresponding to almost two million hadronic Z decays and to a total integrated luminosity of 79 pb-1. For all channels, the data agree well with the standard model expectation both in shape and normalization. The indication of an excess in thee^ + e^ - to tau ^ + tau ^ - fbar f channel, reported by ALEPH in 1991, is not confirmed.

Study of the four-fermion final state at the Z resonance / D., B., D., C., I., B., D., D., P., G., C., G., J. P., L., M. N., M., P., O., B., P., F., A., M., C., J. M., C., I., E., E., F., M., F.B., V., G., Garrido, L.l., M., M., S., O., et al.. - In: ZEITSCHRIFT FÜR PHYSIK. C, PARTICLES AND FIELDS. - ISSN 0170-9739. - STAMPA. - 66:(1995), pp. 3-18. [10.1007/BF01496576]

Study of the four-fermion final state at the Z resonance

GREGORIO, ANNA;BOSISIO, LUCIANO;GIANNINI, GIANROSSANO;
1995-01-01

Abstract

The process e+e-→, where l is a charged or a neutral lepton and f any charged fermion, is analyzed. The study uses the ALEPH data collected at LEP from 1989 to 1993 at centre-of-mass energies between 88 and 95 GeV, corresponding to almost two million hadronic Z decays and to a total integrated luminosity of 79 pb-1. For all channels, the data agree well with the standard model expectation both in shape and normalization. The indication of an excess in thee^ + e^ - to tau ^ + tau ^ - fbar f channel, reported by ALEPH in 1991, is not confirmed.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/2563353
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