TMDs: Evolution, modeling, precision

TL;DR

This paper discusses the modeling and evolution of transverse momentum dependent parton distribution functions, demonstrating stable fits to Drell-Yan and Z-production data, and enabling predictions for current and future colliders.

Contribution

It introduces a method for fitting TMD PDFs using the factorization theorem and resummation, with a focus on non-perturbative evolution effects and their impact on collider predictions.

Findings

Good theoretical stability with $$ per data point

Final fit quality with $$/points $\u2264$ 1

Ability to predict at future collider energies

Abstract

The factorization theorem for $q_T$ spectra in Drell-Yan processes, boson production and semi-inclusive deep inelastic scattering allows for the determination of the non-perturbative parts of transverse momentum dependent parton distribution functions. Here we discuss the fit of Drell-Yan and $Z$-production data using the transverse momentum dependent formalism and the resummation of the evolution kernel. We find a good theoretical stability of the results and a final $\chi^2/{\rm points}\lesssim 1$. We show how the fixing of the non-perturbative pieces of the evolution can be used to make predictions at present and future colliders.