On the PB Sudakov: NNLL coefficient, CS kernel and intrinsic-kt

TL;DR

This paper advances the Transverse Momentum Dependent Parton Branching method by incorporating NNLL coefficients, analyzing the CS kernel, and exploring intrinsic-kt effects to improve QCD predictions in collider physics.

Contribution

It introduces the inclusion of NNLL coefficients in the PB Sudakov form factor and examines the CS kernel and intrinsic-kt effects within the TMD framework.

Findings

Derived the relation between PB and CSS Sudakov form factors.

Included NNLL coefficients in the PB Sudakov for improved accuracy.

Analyzed the impact of intrinsic-kt versus center-of-mass dependence.

Abstract

The Transverse Momentum Dependent (TMD) Parton Branching (PB) method incorporates elements of TMD physics into a Monte Carlo (MC) framework to produce high-energy QCD predictions for collider processes. It derives TMDs from the PB evolution equation - solvable with MC techniques - fits them to data, and then enables their use in MC event generators for QCD predictions. In this article, we describe the relation of the PB Sudakov form factor to the Sudakov factor in the CSS formalism. We discuss both perturbative and non-perturbative components. We present recent developments to include NNLL coefficient in the PB Sudakov. We discuss the CS kernel extractions for different evolution scenarios. We remark the recent studies on intrinsic-kt vs center-of-mass (in)dependence in different approaches and their relation to the non-perturbative Sudakov.