Non-factorisable two-loop contribution to $t$-channel single-top production
Christian Br{\o}nnum-Hansen, J\'er\'emie Quarroz, Chen-Yu Wang
TL;DR
This paper computes the last missing two-loop non-factorisable virtual corrections to $t$-channel single-top production, providing essential components for precise theoretical predictions and assessing their impact on experimental measurements.
Contribution
It presents the first complete calculation of non-factorisable two-loop contributions to single-top production, completing the two-loop virtual correction set.
Findings
Analytic reduction to master integrals achieved.
Fast numerical evaluation method developed.
Estimated impact on experimental observables.
Abstract
We report on a recent computation of the non-factorisable contribution to the two-loop helicity amplitude for -channel single-top production arXiv:2108.09222. This is the last missing piece of the two-loop virtual corrections to this process. We perform analytic integration-by-parts reduction to master integrals and use the auxiliary mass flow method for their fast numerical evaluation. The impact of the non-factorisable corrections to single-top production on experimentally measured observables is estimated.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · Particle Accelerators and Free-Electron Lasers · Particle Detector Development and Performance