Sep 9 – 13, 2019
Europe/Zurich timezone

The role of soft quarks in next-to-leading power threshold effects

Sep 10, 2019, 3:30 PM



Melissa van Beekveld (R)


Cross-sections in perturbative QCD are plagued by large corrections from soft and collinear radiation. The most singular terms are known to be universal, which allows their resummation to all orders in the coupling. In our work, we have examined the structure of the next-to-singular contributions, which can originate from the emission of both soft quarks and gluons. In this talk, I will show that we can derive a next-to-soft amplitude for both types of emissions. In addition, I will show the numerical impact of these contributions on the transverse momentum distribution of the single-photon production process.

Primary authors

Melissa van Beekveld (R) Chris White (Queen Mary University of London) Eric Laenen (Nikhef National institute for subatomic physics (NL))

Presentation materials