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Measurement of triple gauge WW$\gamma$ couplings at LEP2 using photonic events (1998)

Abstract
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 sectionsand 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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Download http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=ep-98-178
http://cdsweb.cern.ch/record/372371/files/ep-98-178.pdf
http://cdsweb.cern.ch/record/372371/files/ep-98-178.ps.gz
Repository CERN Document Server (Switzerland)
Keywords Particle Physics - Experimental Results
Language eng