The total cross section and the forward-backward asymmetry for the process e+e- → μ+μ- (nγ) are measured in the energy range 20-136 GeV by reconstructing the effective centre-of-mass energy after initial state radiation. The analysis is based on the data recorded with the ALEPH detector at LEP between 1990 and 1995, corresponding to a total integrated luminosity of 143.5 pb-1. Two different approaches are used: in the first one an exclusive selection of events with hard initial state radiation in the energy range 20-88 GeV is directly compared with the Standard Model predictions showing good agreement. In the second one, all events are used to obtain a precise measurement of the energy dependence of σ0 and A0FB from a model independent fit, enabling constraints to be placed on models with extra Z bosons.

Barate, R., Buskulic, D., Decamp, D., Ghez, P., Goy, C., Lees, J., et al. (1997). Study of muon-pair production at centre-of-mass energies from 20 to 136 GeV with the ALEPH detector. PHYSICS LETTERS. SECTION B, 399(3-4), 329-341 [10.1016/S0370-2693(97)00353-5].

Study of muon-pair production at centre-of-mass energies from 20 to 136 GeV with the ALEPH detector

CARPINELLI, Massimo;
1997

Abstract

The total cross section and the forward-backward asymmetry for the process e+e- → μ+μ- (nγ) are measured in the energy range 20-136 GeV by reconstructing the effective centre-of-mass energy after initial state radiation. The analysis is based on the data recorded with the ALEPH detector at LEP between 1990 and 1995, corresponding to a total integrated luminosity of 143.5 pb-1. Two different approaches are used: in the first one an exclusive selection of events with hard initial state radiation in the energy range 20-88 GeV is directly compared with the Standard Model predictions showing good agreement. In the second one, all events are used to obtain a precise measurement of the energy dependence of σ0 and A0FB from a model independent fit, enabling constraints to be placed on models with extra Z bosons.
Articolo in rivista - Articolo scientifico
Physics
English
1997
399
3-4
329
341
none
Barate, R., Buskulic, D., Decamp, D., Ghez, P., Goy, C., Lees, J., et al. (1997). Study of muon-pair production at centre-of-mass energies from 20 to 136 GeV with the ALEPH detector. PHYSICS LETTERS. SECTION B, 399(3-4), 329-341 [10.1016/S0370-2693(97)00353-5].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/390191
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