The total cross section and the forward-backward asymmetry for the process e(+)e --> mu(+)mu(-)(n gamma) 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 sigma(0) and A(FB)(0) from a model independent fit, enabling constraints to be placed on models with extra Z bosons.

R., B., D., B., D., D., P., G., C., G., J. P., L., 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

CIOCCI, MARIA AGNESE;MARROCCHESI, PIER SIMONE;
1997-01-01

Abstract

The total cross section and the forward-backward asymmetry for the process e(+)e --> mu(+)mu(-)(n gamma) 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 sigma(0) and A(FB)(0) from a model independent fit, enabling constraints to be placed on models with extra Z bosons.
1997
R., B., D., B., D., D., P., G., C., G., J. P., L., 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/11365/38521
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