e+ (Anti)Quark Scattering in the Presence of the Anomalous HERA Positron-Jet Event Phenomenon

الأصل · EN

We discuss the leptoquark interpretation of the anomalous HERA positron-jet events in the context of the YFS exponentiated Monte Carlo event generator treatment of the attendant multiple photon radiative effects for both the would-be signal and the SM background, wherein finite-pₜ photon effects are properly taken into account and wherein infrared singularities are cancelled to all orders in α. We show that H1 and ZEUS data are consistent with such an interpretation for a leptoquark coupling 0.3gW, mass 200 GeV, and width 2GeV. Possible future tests are proposed.