Eur. Phys. J. C (2015) 75: 581
https://doi.org/10.1140/epjc/s10052-015-3793-y

Letter

The subtraction method for top-quark production at hadron colliders

¹ Dipartimento di Fisica, Università di Roma “La Sapienza”, 00185, Rome, Italy
² INFN, Sezione di Roma, 00185, Rome, Italy
³ INFN, Sezione di Firenze, 50019, Sesto Fiorentino, Florence, Italy
⁴ Dipartimento di Fisica e Astronomia, Università di Firenze, 50019, Sesto Fiorentino, Florence, Italy
⁵ Physik-Institut, Universität Zürich, 8057, Zurich, Switzerland

^* e-mail: grazzini@physik.uzh.ch

Received: 25 August 2015
Accepted: 13 November 2015
Published online: 9 December 2015

Abstract

We consider QCD radiative corrections to top-quark pair production at hadron colliders. We use the subtraction formalism to perform a fully differential computation for this process. Our calculation is accurate up to the next-to-leading order in QCD perturbation theory and it includes all the flavour off-diagonal partonic channels at the next-to-next-to-leading order. We present a comparison of our numerical results with those obtained with the publicly available numerical programs MCFM and Top++.