Search for Single Leptoquark Production in Electron-Photon Scattering at 161 and 172 GeV

Details Search for Single Leptoquark Production in Electron-Photon Scattering at 161 and 172 GeV Search for Single Leptoquark Production in Electron-Photon Scattering at 161 and 172 GeV

1997-06-03

arxiv.org/abs/hep-ex/9706003v1

Physics

High Energy Physics

High Energy Physics - Experiment

5 pages, 2 figures, submitted to the proceedings of Photon '97, Egmond aan Zee, The Netherlands

Scientific paper

A search for a first generation scalar leptoquark (LQ) has been performed using the data collected by the OPAL detector in 1996 at e+e- centre-of-mass energies sqrt{s} of 161 and 172 GeV. It is assumed that a single leptoquark can be produced in the process eq->LQ, where the initial state quark originates from a hadronic fluctuation of a quasi-real photon which has been radiated by one of the LEP beams. Lower limits at the 95 % confidence level on the mass of a first generation scalar leptoquark of 131 GeV for beta=0.5 and beta=1, coupling values lambda larger than sqrt{4*pi*alpha_em) and leptoquark charges -1/3 or -5/3 are obtained.

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