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Measurement of Z/γ∗ production in compton scattering of quasi-real photons

Bailey, Ian Richard and Kartvelishvili, Vakhtang (2002) Measurement of Z/γ∗ production in compton scattering of quasi-real photons. European Physical Journal C: Particles and Fields, 24 (1). pp. 1-15. ISSN 1434-6044

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Abstract

The process e+e− → e+e−Z/γ∗ is studied with the OPAL detector at LEP at a centre of mass energy of √s = 189 GeV. The cross-section times the branching ratio of the Z/γ∗ decaying into hadrons is measured within Lorentz invariant kinematic limits to be (1.2 ± 0.3 ± 0.1) pb for invariant masses of the hadronic system between 5 GeV and 60 GeV and (0.7 ± 0.2 ± 0.1) pb for hadronic masses above 60 GeV. The differential cross-sections of the Mandelstam variables ˆs, ˆt, and ˆu are measured and compared with the predictions from the Monte Carlo generators grc4f and PYTHIA. From this, based on a factorisation ansatz, the total and differential cross-sections for the subprocess eγ → eZ/γ∗ are derived.

Item Type: Article
Journal or Publication Title: European Physical Journal C: Particles and Fields
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 82940
Deposited By: ep_importer_pure
Deposited On: 16 Nov 2016 12:16
Refereed?: Yes
Published?: Published
Last Modified: 21 Sep 2017 01:52
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/82940

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