We present a new analysis to extract pion's parton distribution functions (PDFs) in the framework of the statistical model. Starting from the statistical model framework first developed for the spin-1/2 nucleon, we apply appropriate modifications taking into account the spin-0 nature of pion and the isospin and charge-conjugation symmetry properties. This results in a significant reduction of the number of parameters compared to a recent work to extract pion's PDFs. Using π−-induced Drell-Yan data to determine the parameters of this statistical model approach, we show that a good description of these experimental data with Next-to-Leading order QCD calculations can be obtained. Good agreement between the calculations and the π+/π− Drell-Yan cross section ratio data, not included in the global fit, has confirmed the predictive power of these new pion PDFs.
@article{arxiv.2008.05703,
title = {A New Extraction of Pion Parton Distributions in the Statistical Model},
author = {Claude Bourrely and Franco Buccella and Jen-Chieh Peng},
journal= {arXiv preprint arXiv:2008.05703},
year = {2021}
}