On duality of Drell-Yan and J/psi production processes

TL;DR

This paper explores a model linking Drell-Yan and J/psi production to extract parton distribution functions, highlighting gluon contributions and its applicability at low energies, with surprising findings at high energies.

Contribution

It introduces a model for J/psi production that enables combined analysis with Drell-Yan data to extract PDFs, emphasizing gluon roles and energy region applicability.

Findings

Model is valid for energies below 100 GeV

Gluon contributions significantly affect J/psi cross-sections

Surprising results observed at high energies

Abstract

It is studied the model on J/psi production allowing to extract parton distribution functions (PDFs) from the combined analysis with both data on Drell-Yan and J/psi production processes. It is shown that this, so attractive from theoretical point of view, model, can be safely used in the low energy region E<100 GeV. The significance of gluon contributions to the J/psi cross-sections is investigated. The obtained results in the high energy region occur to be rather surprising.