Speaker
Michael Wagman
(Fermilab)
Description
I will present a lattice QCD calculation of the nonperturbative Collins-Soper kernel, which describes the rapidity evolution of quark transverse-momentum-dependent parton distribution functions. I will discuss ongoing work to perform the first determination of the Collins-Soper kernel using approximately physical quark masses and various challenges and systematic uncertainties that arise, including power corrections and Fourier transform truncation effects.
