Multi-photon final states in e+e− collisions at ∝s =130-172 GeV

Kartvelishvili, Vakhtang (1998) Multi-photon final states in e+e− collisions at ∝s =130-172 GeV. European Physical Journal C: Particles and Fields, 1 (1). pp. 21-30. ISSN 1434-6044

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Abstract

The process e+e− →, γγ(γ) is studied using data recorded with the OPAL detector at LEP. The data sample corresponds to a total integrated luminosity of 25.38 pb−1 taken at centre-of-mass energies of 130–172 GeV. The measured cross-sections agree well with the expectation from QED. In a combined fit using data from all centre-of-mass energies, the angular distribution is used to obtain improved limits on the cut-off parameters: Λ+ > 195 GeV and Λ− > 210 GeV (95% CL). In addition, limits on nonstandard e+e−γ couplings and contact interactions, as well as a 95% CL mass limit for an excited electron,Me*= > 194 GeV for an e+e−γ coupling κ = 1, are determined.

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:
ID Code:
82530
Deposited By:
Deposited On:
01 Nov 2016 11:32
Refereed?:
Yes
Published?:
Published
Last Modified:
11 Mar 2020 05:39