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arXiv · 2412.21116

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
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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.

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A. Bermudez Martinez, F. Hautmann, L. Keersmaekers, A. Lelek, M. Mendizabal Morentin, S. Taheri Monfared, A. M. van Kampen. 2024-12-30. Soft-gluon coupling and the TMD parton branching Sudakov form factor. https://arxiv.org/abs/2412.21116

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