The Drell-Yan process with pions and polarized nucleons

The Drell-Yan process provides important information on the internal struc- ture of hadrons including transverse momentum dependent parton distribution functions (TMDs). In this work we present calculations for all leading twist structure functions de- scribing the pion induced Drell-Yan process. The non-perturbative input for the TMDs is taken from the light-front constituent quark model, the spectator model, and available parametrizations of TMDs extracted from the experimental data. TMD evolution is im- plemented at Next-to-Leading Logarithmic precision for the first time for all asymmetries. Our results are compatible with the first experimental information, help to interpret the data from ongoing experiments, and will allow one to quantitatively assess the models in future when more precise data will become available.

Automated summary

The study calculates structure functions for the pion-induced Drell-Yan process, using inputs from the light-front constituent quark model and the spectator model. The implementation of TMD evolution for all asymmetries at Next-to-Leading Logarithmic precision is a first in this field. Results are in line with experimental data, aiding in data interpretation and future model assessment.