Effect of nuclear medium on the spatial distribution of pions

TL;DR

This paper investigates how nuclear medium affects the spatial distribution of pions by calculating their generalized parton distributions and related properties within an isospin asymmetric nuclear environment.

Contribution

It introduces a method to incorporate medium modifications into pion GPDs using a light-cone quark model combined with chiral SU(3) quark mean field inputs.

Findings

Medium modifications align with experimental data

Electromagnetic form factors are consistent with predictions

Charge radii are affected by nuclear medium

Abstract

We calculate the valence quark generalized parton distributions (GPDs) of the lightest pseudoscalar meson, pion, in an isospin asymmetric nuclear matter at zero temperature by employing a light-cone quark model. The medium modifications in the unpolarized GPDs have been incorporated by taking inputs from the chiral SU($3$) quark mean field model. The electromagnetic form factors (EMFFs) and charge radii have been calculated for both the vacuum and in-medium cases. These results are found to be in agreement with the available experimental data and other model predictions.