Measurement of radiative Bhabha and quasi-real Compton scattering

L3 Collaboration

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4 Scopus citations

Abstract

We report on a study of radiative Bhabha and quasi-real Compton scattering at centre-of-mass energies between 50 GeV and 170 GeV, and 20 GeV and 140 GeV, respectively, using the L3 detector at LEP. The analysis is based on data corresponding to an integrated luminosity of 232.2 pb-1. A total of 2856 radiative Bhabha and 4641 Compton scattering events are collected. Total and differential cross sections for both reactions are presented and found to be in good agreement with QED expectations. Our measurement of Compton scattering at the highest energies obtained so far is used to derive exclusion limits on the coupling λ for the on-shell production of an excited electron e(black star) decaying into a γe pair in the mass range 20GeV < me* < 170GeV.

Original languageEnglish (US)
Pages (from-to)183-196
Number of pages14
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume439
Issue number1-2
DOIs
StatePublished - Oct 29 1998

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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