Single top production at HERA in the Standard Model and its minimal supersymmetric extension

Details Single top production at HERA in the Standard Model and its minimal supersymmetric extension Single top production at HERA in the Standard Model and its minimal supersymmetric extension

2006-06-07

arxiv.org/abs/hep-ph/0606073v2

Nucl.Phys.B790:200-215,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

20 pages, 14 figures; some formulas rewritten, input parameters updated, references added, matches version to appear in Nucl.

Scientific paper

10.1016/j.nuclphysb.2007.09.004

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.

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