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

OPAL Collaboration (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:
Journal Article
Journal or Publication Title:
European Physical Journal C: Particles and Fields
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2200/2201
Subjects:
?? PHYSICS AND ASTRONOMY (MISCELLANEOUS)ENGINEERING (MISCELLANEOUS) ??
ID Code:
82940
Deposited By:
Deposited On:
16 Nov 2016 12:16
Refereed?:
Yes
Published?:
Published
Last Modified:
17 Sep 2023 01:58