Soft-Gluon Corrections in FCNC Top-Quark Production via Anomalous Gluon Couplings

Abstract

We present a calculation of soft-gluon corrections in FCNC top-quark production via anomalous $t$-$q$-$g$ couplings. The soft anomalous dimension matrix is explicitly calculated at one-loop accuracy. This calculation allows threshold resummation at next-to-leading-logarithm accuracy. We also derive expressions for the soft-gluon corrections at NLO and at NNLO.

Comments: 17 pages, 8 figures; a new section with two figures has been added