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Non-factorisable contribution to $t$-channel single-top production

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arxiv 2204.05770 v1 pith:A7PDM6SU submitted 2022-04-12 hep-ph

Christian Br{o}nnum-Hansen , Kirill Melnikov , Jérémie Quarroz , Chiara Signorile-Signorile , Chen-Yu Wang This is my paper · ORCID
classification hep-ph
keywords correctionsnon-factorisableproductionsingle-topchannelalphaappeararise
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abstract

We compute the non-factorisable ${\cal O}(\alpha_s^2)$ 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.

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  1. Integral of the double-emission eikonal function for a massive and a massless emitter at an arbitrary angle

    hep-ph 2025-04 accept novelty 6.0 of 10

    The integrated double-soft eikonal function for a massive and a massless emitter at arbitrary angle is derived analytically and cross-checked with a semi-numerical subtraction method.

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