Light-Front Holography Model of the EMC Effect

TL;DR

This paper introduces a Light-Front Holographic QCD model explaining the EMC effect as a consequence of nuclear potential breaking SU(6) symmetry, linking nuclear structure functions with SRC pair density.

Contribution

It presents a novel two-component model of the EMC effect based on LFHQCD, connecting nuclear modifications to symmetry breaking and SRC correlations.

Findings

The model separates nuclear structure functions into free and medium-modified parts.

It establishes a universal function for all nuclei's medium modifications.

The model links the EMC effect size with SRC pair density.

Abstract

A new two-component model of the EMC effect based on Light-Front Holographic QCD (LFHQCD) is presented. The model suggests the EMC effect is the result of the nuclear potential breaking SU(6) symmetry. The model separates the $F_2^A$ nuclear structure function into two parts: a free contribution, involving the addition of proton and neutron structure functions weighted by the number of protons and neutrons respectively, and a nuclear/medium modified contribution that involves a universal function for all nuceli. Further, the model displays a connection with the correlation between the size of the EMC effect and the SRC pair density, $a_2$ - extracted from kinematic plateaus at around $x$ > 1 in inclusive quasi-elastic (QE) scattering.