Single-top production in the s-channel and the top-quark mass

TL;DR

This paper develops an approximate NNLO calculation for s-channel single-top production using soft-gluon resummation, implements it in Hathor, and fits the top-quark mass to Tevatron data in different schemes.

Contribution

It introduces an approximate NNLO formula for single-top s-channel production based on soft-gluon resummation and applies it to top-quark mass extraction from experimental data.

Findings

Top-quark mass fitted in pole and MSbar schemes

Implementation of NNLO approximation in Hathor

Agreement with Tevatron cross section measurements

Abstract

We use a fixed-order expansion of resummed soft-gluon corrections to determine an approximate NNLO formula for the partonic cross section of single-top production in the $s$-channel. This formula is implemented in the program Hathor for the numerical evaluation of hadronic cross sections. With the resulting code, we perform a fit of the top-quark mass to Tevatron cross section data. Results for $m_t$ are given in the pole-mass scheme and in the $\overline{\mathrm{MS}}$ scheme.