arXiv:2412.21116·v2·High Energy Physics — Phenomenology
Soft-gluon coupling and the TMD parton branching Sudakov form factor
A. Bermudez Martinez🇩🇪 · F. Hautmann🇧🇪 · L. Keersmaekers🇧🇪 · A. Lelek🇧🇪 · M. Mendizabal Morentin🇩🇪 · S. Taheri Monfared🇩🇪 · A.M. van Kampen🇧🇪
Abstract
The evolution of transverse momentum dependent (TMD) distributions in Quantum Chromodynamics (QCD) can be formulated in a parton branching (PB) framework. We show that next-to-next-to-leading-logarithm (NNLL) accuracy can be achieved in this framework by using the concept of soft-gluon physical coupling. We present results for the TMD distributions and for the Collins-Soper kernel controlling rapidity evolution. The results pave the way for PB predictions at NNLL level for physical observables at the Large Hadron Collider (LHC) and future colliders.
Comments: 7 pages, 2 figures. v2: comments and references added; results unchanged; matches published version