Linear Power Corrections in t-channel Single Top Production

by Paolo Nason (Universita & INFN, Milano-Bicocca (IT))

Thursday 16 Mar 2023, 14:30 → 15:30 Europe/Zurich

Room U3-11 (University of Milan-Bicocca)

I discuss linear power corrections to the electroweak production of
top quarks using renormalon calculus. I show how these corrections
can be computed using the Low-Burnett-Kroll theorem, which provides
the first subleading term to the soft-limit expansion of the
real-emission amplitude. I show that the linear power corrections
cancel in the total cross section for arbitrary processes of
single top production type, provided the cross section is expressed
in terms of a short-distance mass. A universal formula for the linear
power corrections to kinematic distributions involving the
top quark momentum is also given.

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