Flavor-dependent b-profiles from Drell-Yan spectra at low transverse momenta

TL;DR

This paper investigates how flavor-dependent non-perturbative b-profiles influence the extraction of TMD distributions from low transverse momentum Drell-Yan data, highlighting the importance of accounting for PDF uncertainties.

Contribution

It introduces the first flavor-dependent non-perturbative b-profiles in TMD analysis, improving the reliability of TMD determinations from Drell-Yan spectra.

Findings

Flavor-dependent non-perturbative b-profiles are essential for accurate TMD extraction.

PDF uncertainties significantly affect TMD distribution determinations.

Inclusion of flavor dependence improves agreement with experimental Drell-Yan data.

Abstract

We discuss our recent study of the impact of collinear PDFs and their uncertainties on the determination of transverse momentum dependent (TMD) distributions and the description of Drell-Yan (DY) production measurements at low transverse momenta. Using QCD factorization and evolution in transverse coordinate b space, this study takes into account for the first time flavor-dependent non-perturbative b-profiles. It illustrates that collinear PDF uncertainties and non-perturbative TMD flavor dependence are both essential to obtain reliable TMD determinations.