Angular structure of Drell-Yan reaction in the TMD factorization approach

TL;DR

This paper advances the understanding of angular distributions in the Drell-Yan process by incorporating power corrections into the TMD factorization framework, aligning well with experimental data and revealing new insights into the Boer-Mulders function at LHC energies.

Contribution

It introduces an extended TMD factorization approach with power corrections, enabling better description of observables and providing first LHC evidence of the Boer-Mulders function.

Findings

Good agreement with experimental data

First LHC indication of Boer-Mulders function

Power corrections are significant in TMD phenomenology

Abstract

We study angular distributions in the Drell-Yan process using an extended transverse momentum dependent (TMD) factorization framework that includes kinematic power corrections. This approach allows the description of observables previously considered power-suppressed. The results show good agreement with experimental data and provide the first LHC-based indication of the Boer-Mulders function, highlighting the value of power corrections in TMD phenomenology.