TMD Soft Function from Large-Momentum Effective Theory
Abstract
We study Euclidean formulations of the transverse-momentum-dependent (TMD) soft function, which is a cross section for soft gluon radiations involving color charges moving in two conjugate lightcone directions in quantum chromodynamics. We show it is related to a special form factor of a pair of color sources traveling with nearly-lightlike velocities, which can be matched to TMD physical observables in semi-inclusive deep-inelastic scattering and Drell-Yan process in the framework of large momentum effective theory. It can also be extracted by combining a large-momentum form factor of light meson and its leading TMD wave function. These formulations are useful for initiating nonperturbative calculations of this useful quantity.
Cite
@article{arxiv.1910.11415,
title = {TMD Soft Function from Large-Momentum Effective Theory},
author = {Xiangdong Ji and Yizhuang Liu and Yu-Sheng Liu},
journal= {arXiv preprint arXiv:1910.11415},
year = {2020}
}
Comments
5 pages, 1 figure