On non-factorisable contributions to t-channel single-top production

We compute the non-factorisable contribution to the two-loop helicity amplitude for t-channel single-top production, the last missing piece of the two-loop virtual corrections to this process. Our calculation employs analytic reduction to master integrals and the auxiliary mass flow method for their fast numerical evaluation. We study the impact of these corrections on basic observables that are measured experimentally in the single-top production process.

Automated summary

The non-factorisable contribution to the two-loop helicity amplitude for t-channel single-top production was computed, using analytic reduction to master integrals and the auxiliary mass flow method for numerical evaluation. The impact of these corrections on basic observables measured in the single-top production process was also studied.