The process e+e- --> llBARffBAR, where 1 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 the e+e- --> tau+ tau- ffBAR channel, reported by ALEPH in 1991, is not confirmed.

Study of the four-fermion final state at the Z resonance / Buskulic, D., Casper, D., de Bonis, I., Decamp, D., Ghez, P., Goy, C., Lees, J.-P., Minard, M.-N., Odier, P., Pietrzyk, B., Ariztizabal, F., Chmeissani, M., Crespo, J.M., Efthymiopoulos, I., Fernandez, E., Fernandez-Bosman, M., Gaitan, V., Garrido, Ll., Martinez, M., Orteu, S., et al.. - In: ZEITSCHRIFT FÜR PHYSIK. C, PARTICLES AND FIELDS. - ISSN 0170-9739. - STAMPA. - 66:1-2(1995), pp. 3-18. [10.1007/BF01496576]

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

Creanza, D.;Iaselli, G.;Maggi, G.;
1995

Abstract

The process e+e- --> llBARffBAR, where 1 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 the e+e- --> tau+ tau- ffBAR channel, reported by ALEPH in 1991, is not confirmed.
1995
Study of the four-fermion final state at the Z resonance / Buskulic, D., Casper, D., de Bonis, I., Decamp, D., Ghez, P., Goy, C., Lees, J.-P., Minard, M.-N., Odier, P., Pietrzyk, B., Ariztizabal, F., Chmeissani, M., Crespo, J.M., Efthymiopoulos, I., Fernandez, E., Fernandez-Bosman, M., Gaitan, V., Garrido, Ll., Martinez, M., Orteu, S., et al.. - In: ZEITSCHRIFT FÜR PHYSIK. C, PARTICLES AND FIELDS. - ISSN 0170-9739. - STAMPA. - 66:1-2(1995), pp. 3-18. [10.1007/BF01496576]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/162
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