Search for Single Top Quark Production at HERA

Details Search for Single Top Quark Production at HERA Search for Single Top Quark Production at HERA

2009-04-24

arxiv.org/abs/0904.3876v2

Phys.Lett.B678:450-458,2009

Physics

High Energy Physics

High Energy Physics - Experiment

Revised version with small text changes. 22 pages, 6 figures

Scientific paper

10.1016/j.physletb.2009.06.057

A search for single top quark production is performed in the full ep data sample collected by the H1 experiment at HERA, corresponding to an integrated luminosity of 474 pb^-1. Decays of top quarks into a b quark and a W boson with subsequent leptonic or hadronic decay of the W are investigated. A multivariate analysis is performed to discriminate top quark production from Standard Model background processes. An upper limit on the top quark production cross section via flavour changing neutral current processes sigma (ep -> etX) < 0.25 pb is established at 95% CL. Limits on the anomalous coupling kappa_{tu gamma} are derived.

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