Gluon EMC effects in nuclear matter

Abstract

We investigate the gluonic structure of nuclei within a mean-field model of nuclear structure based upon the modification of the structure of a bound nucleon, with the nucleon described by the Nambu--Jona-Lasinio model. This approach has been shown to reproduce the European Muon Collaboration (EMC) effect, involving the ratio of the spin-independent structure functions of a heavier nucleus to that of the deuteron. It also predicts a significant nuclear modification for the spin structure functions, known as the polarized EMC effect. Here we report sizeable nuclear modifications of the gluon distributions (a "gluon EMC effect") for the ratios of both the unpolarized and polarized gluon distributions in nuclear matter to those of a free nucleon.

11 pages, 3 figures

References in corpus (5)

• A first unbiased global determination of polarized PDFs and their uncertainties
• Science Requirements and Detector Concepts for the Electron-Ion Collider: EIC Yellow Report
• Isovector EMC effect explains the NuTeV anomaly
• Role of diquark correlations and the pion cloud in nucleon elastic form factors
• First lattice QCD study of the gluonic structure of light nuclei