Pion nucleus Drell-Yan process and parton transverse momentum in the pion

TL;DR

This paper analyzes pion-nucleus Drell-Yan processes to study pion transverse momentum distributions using a Nambu--Jona-Lasinio model, comparing predictions with experimental data to inform future Electron Ion Collider research.

Contribution

It introduces a calculation of pion transverse momentum distributions within a Nambu--Jona-Lasinio framework and tests their evolution against experimental data, aiding future collider studies.

Findings

Fair agreement with pion-nucleus Drell-Yan data

Validated TMD evolution up to next-to-leading logarithmic accuracy

Supports future Electron Ion Collider investigations

Abstract

During the INT-18-3 workshop, we presented an analysis of unpolarized Drell-Yan pair production in pion-nucleus scattering with a particular focus into the pion Transverse Momentum Distributions in view of the future Electron Ion Collider. The transverse distributions of the pion calculated in a Nambu--Jona-Lasinio framework, with Pauli-Villars regularization, were used. The pion Transverse Momentum Distributions evolved up to next-to-leading logarithmic accuracy is then tested against the transverse momentum spectrum of dilepton pairs up to a transverse momentum of 2 GeV. We found a fair agreement with available pion-nucleus data. This contribution joins common efforts from the TMD and the pion structure communities for the Electron Ion Collider.