TMD Parton Distributions based on Three-Body Decay Functions in NLL Order of QCD

TL;DR

This paper develops a method to evaluate TMD parton distribution functions using three-body decay functions in NLL order of QCD, incorporating interference effects and comparing with existing algorithms.

Contribution

It introduces a novel approach using three-body decay functions for TMD PDFs at NLL order, including interference effects, and compares results with previous algorithms.

Findings

Incorporation of interference contributions improves TMD PDF accuracy.

Comparison shows consistency with existing algorithms at the last step of evolution.

Properties of decay functions are systematically examined.

Abstract

Three-body decay functions in space-like parton branches are implemented to evaluate transverse-momentum-dependent (TMD) parton distribution functions in the next-to-leading logarithmic (NLL) order of quantum chromodynamics (QCD). Interference contributions due to the next-to-leading order contribution are taken into account for the evaluation of the transverse momenta in initial state parton radiations. Some properties of the decay functions are also examined. As an example, we compare our results with an algorithm proposed in Ref.1), in which a transverse momentum distributions are evaluated at the last step of parton evolutions.