Single top production at HERA in the Standard Model and its minimal supersymmetric extension
arXiv:hep-ph/0606073 · doi:10.1016/j.nuclphysb.2007.09.004
Abstract
The H1 Collaboration at the DESY electron-proton collider HERA has observed, in photoproduction and neutral-current deep-inelastic scattering, an unexpected excess of events with isolated leptons and missing transverse momentum, especially at large values of hadronic transverse momentum - a signature typical for single top-quark production. This observation is being substantiated in the HERA II run. Motivated by this, we evaluate the cross section of single top-quark photo- and electroproduction both in the standard model and its minimal supersymmetric extension, considering both minimal and non-minimal flavour-violation scenarios in the latter case.
arXiv comment20 pages, 14 figures; some formulas rewritten, input parameters updated, references added, matches version to appear in Nucl. Phys. B
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