We compute the non-factorisable O(αs2) corrections to t-channel single-top quark production at the LHC. These peculiar corrections arise because of interactions between the heavy- and the light-quark lines and appear for the very first time at next-to-next-to-leading order in perturbative QCD. We find that the non-factorisable corrections change the single-top production cross section and the relevant kinematic distributions in this process by about half a percent.
@article{arxiv.2204.05770,
title = {Non-factorisable contribution to $t$-channel single-top production},
author = {Christian Brønnum-Hansen and Kirill Melnikov and Jérémie Quarroz and Chiara Signorile-Signorile and Chen-Yu Wang},
journal= {arXiv preprint arXiv:2204.05770},
year = {2022}
}