Determination of the e+e- -> gamma gamma (gamma) cross-section at LEP 2
High Energy Physics - Experiment
2008-11-26 v1
Abstract
A test of the benchmark QED process e+e- -> gamma gamma (gamma) is reported, using the data collected with the DELPHI detector at LEP 2. The data analysed were recorded at centre-of-mass energies ranging from 161 GeV to 208 GeV and correspond to a total integrated luminosity of 656.4 pb^{-1}. The Born cross-section for the process e+e- -> gamma gamma (gamma) was determined, confirming the validity of QED at the highest energies ever attained in electron-positron collisions. Lower limits on the parameters of a number of possible deviations from QED, predicted within theoretical frameworks expressing physics beyond the Standard Model, were derived.
Keywords
Cite
@article{arxiv.hep-ex/0409058,
title = {Determination of the e+e- -> gamma gamma (gamma) cross-section at LEP 2},
author = {The DELPHI Collaboration and J. Abdallah},
journal= {arXiv preprint arXiv:hep-ex/0409058},
year = {2008}
}
Comments
24 pages, 5 figures, Accepted by Eur. Phys. J. C