Regular Article - Theoretical Physics
production at NNLO: the flavour off-diagonal channels
INFN, Sezione di Firenze, Florence, Italy
2 Dipartimento di Fisica e Astronomia, Università di Firenze, Sesto Fiorentino, 50019, Florence, Italy
3 Physik Institut, Universität Zürich, 8057, Zurich, Switzerland
4 International Center for Advanced Studies (ICAS), ICIFI and ECyT,Universidad Nacional de San Martin(UNSAM), 25 de Mayo y Francia (1650), Buenos Aires, Argentina
5 Dipartimento di Fisica, Università degli Studi di Milano-Bicocca, Milan, Italy
6 INFN, Sezione di Milano-Bicocca, 20126, Milan, Italy
Accepted: 17 May 2021
Published online: 2 June 2021
We consider QCD radiative corrections to the associated production of a heavy-quark pair () with a generic colourless system F at hadron colliders. We discuss the resummation formalism for the production of the system at small values of its total transverse momentum . We present the results of the corresponding resummation coefficients at next-to-leading and, partly, next-to-next-to-leading order. The perturbative expansion of the resummation formula leads to the explicit ingredients that can be used to apply the subtraction formalism to fixed-order calculations for this class of processes. We use the subtraction formalism to perform a fully differential perturbative computation for the production of a top-antitop quark pair and a Higgs boson. At next-to-leading order we compare our results with those obtained with established subtraction methods and we find complete agreement. We present, for the first time, the results for the flavour off-diagonal partonic channels at the next-to-next-to-leading order.
© The Author(s) 2021
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
Funded by SCOAP3