Speaker
Qi-An Zhang
(T.D. Lee Institute)
Description
The transverse-momentum-dependent (TMD) soft function is a key ingredient in QCD factorization of Drell-Yan and other processes with relatively small transverse momentum. We present a lattice QCD study of this function at moderately large rapidity on a 2+1 flavor CLS dynamic ensemble with $a=0.098$ fm. We extract the rapidity-independent (or intrinsic) part of the soft function through a large-momentum-transfer pseudo-scalar meson form factor and its quasi-TMD wave function using leading-order factorization in large-momentum effective theory. We also investigate the rapidity-dependent part of the soft function---the Collins-Soper evolution kernel---based on the large-momentum evolution of the quasi-TMD wave function.
Authors
Qi-An Zhang
(T.D. Lee Institute)
Hua Jun
Huo Yikai
Ji Xiangdong
Liu Yizhuang
Liu Yu-Sheng
Schlemmer Maximilian
Schafer Andreas
Sun Peng
Wang Wei
Yang Yi-Bo
