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

Barate, R. and Finch, Alexander (1997) Study of the muon pair production at center-of-mass energies from 20-GeV to 136-GeV with the ALEPH detector. Physics Letters B, 399 (3-4). pp. 329-341. ISSN 0370-2693

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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 AFB0 from a model independent fit, enabling constraints to be placed on models with extra Z bosons.

Item Type: Article
Journal or Publication Title: Physics Letters B
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 64024
Deposited By: ep_importer_pure
Deposited On: 14 May 2013 16:08
Refereed?: Yes
Published?: Published
Last Modified: 19 Sep 2017 04:44
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/64024

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