Pion partonic distributions in a statistical model from pion induced Drell-Yan and J/Ψ production data

We present a new analysis to extract pion parton distribution functions (PDFs) within the framework of the statistical model. Starting from the statistical model first developed for the spin-1/2 nucleon, we extend this model to describe the spin-0 pion. Based on a combined fit to both the pion-induced Drell-Yan data and the pion-induced J/Psi production data, a new set of pion PDFs has been obtained. The inclusion of the J/Psi production data in the combined fit has provided additional constraints for better determining the gluon distribution in the pion. We also compare the pion PDFs obtained in the statistical model with other existing pion PDFs.

Automated summary

This article presents a new analysis method using the statistical model to extract pion parton distribution functions (PDFs), and obtains a new set of pion PDFs through a combined fit to Drell-Yan data and J/Psi production data. This study is of great significance for better determining the gluon distribution inside the pion.