Speaker
Michael Wagman
(Fermilab)
Description
I will present the first complete determination of the quark Collins-Soper kernel, which relates TMDs at different rapidity scales, using lattice QCD and including systematic control of quark mass, operator mixing, and discretization effects. Next-to-next-to-leading logarithmic matching is used to match lattice-calculable distributions to the corresponding TMDs. The continuum-extrapolated lattice QCD results are consistent with several recent phenomenological parametrizations of the Collins-Soper kernel and are precise enough to disfavor other parametrizations. I will also discuss a first exploration of the gluon Collins-Soper kernel.
Authors
Artur Avkhadiev
(Argonne)
Michael Wagman
(Fermilab)
Phiala Shanahan
(MIT)
Yang Fu
(MIT)
Yong Zhao
(Argonne)
