The non-perturbative Sudakov Form Factor and the role of soft gluons
Abstract
The role of soft gluons in inclusive collinear parton densities as well as in Transverse Momentum Dependent (TMD) parton densities is discussed. Applying the Parton-Branching (PBM) method, the so-called non-perturbative Sudakov form factor could be identified with the integration range , which is neglected in collinear parton shower approaches. The importance of soft gluons could be shown by investigating the transverse momentum spectrum of Drell-Yan lepton pairs, leading to a width of the intrinsic- distribution which is independent on , in contrast to what is observed in parton shower approaches. The reason for this behavior is traced back to the non-perturbative Sudakov form factor. The role of soft gluons for observable hadron spectra is discussed and shown to be negligible. This talk is dedicated to the memory of S. Jadach.
Keywords
Cite
@article{arxiv.2404.06905,
title = {The non-perturbative Sudakov Form Factor and the role of soft gluons},
author = {H. Jung},
journal= {arXiv preprint arXiv:2404.06905},
year = {2024}
}
Comments
Presented at Cracow Epiphany Conference 2024, (typos corrected)