Measurement of triple gauge WWgamma couplings at LEP2 using photonic events

Details Measurement of triple gauge WWgamma couplings at LEP2 using photonic events Measurement of triple gauge WWgamma couplings at LEP2 using photonic events

1999-01-21

arxiv.org/abs/hep-ex/9901030v1

Physics

High Energy Physics

High Energy Physics - Experiment

11 pages, 6 figures

Scientific paper

A study of events with photons and missing energy has been performed with the data sample obtained with the ALEPH detector at centre-of-mass energies from 161 to 184 GeV,corresponding to a total integrated luminosity of about 80 pb**-1. The measured distributions are in agreement with Standard Model predictions, leading to constraints on W W gamma gauge coupling parameters Delta(kappa_gamma) and lambda_gamma. The results from the fit to the cross sections and to the energy and angular distributions of the photons are: Delta(kappa_gamma) = 0.05 +1.15/-1.10 (stat) +/- 0.25 (syst) lambda_gamma = 0.05 +1.55/-1.45 (stat) +/- 0.30 (syst)

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