Speaker
Martin Beneke
(TUM)
Description
The renormalization-group (RG) kernel for the next-to-leading power soft-quark function relevant to Higgs production in gluon-gluon fusion has up-to-now been inferred only from RG consistency of the factorization formula. In this talk the direct computation with position-space techniques is discussed, which reveals some subtleties related to incoming colour charges from "infinity". For the case of external photons, the kernel turns out to be essentially the "double copy" of the leading-twist static B-meson LCDA, to all orders in perturbation theory.
Authors
Martin Beneke
(TUM)
Yao JI
Xing Wang