# Octet baryon electromagnetic form factor double ratios $(G_E^\ast/G_M^\ast)/(G_E/G_M)$ in a nuclear medium

## TL;DR

This paper estimates the in-medium double ratios of electric to magnetic form factors for all octet baryons in symmetric nuclear matter, providing insights into their electromagnetic structure modifications in a nuclear environment.

## Contribution

It introduces the first estimation of the double ratios $(G_E^ extasteriskcentered/G_M^ extasteriskcentered)/(G_E/G_M)$ for octet baryons in nuclear matter across a range of momentum transfer.

## Key findings

- Double ratios vary with $Q^2$ in nuclear medium.
- Results applicable to polarization-transfer measurements.
- Provides theoretical predictions for in-medium baryon structure.

## Abstract

The ratios of the baryon electric ($G_E$) to magnetic ($G_M$) form factors, $G_E/G_M$, can provide us with important information on the structure of baryons in vacuum as demonstrated in recent studies for the proton and neutron systems. It has been argued that the corresponding in-medium ratios, $G_E^\ast/G_M^\ast$, can also provide useful information on the electromagnetic structure of baryons in a nuclear medium. Although the ratios may not be measured directly in experiments except for the proton at present, the double ratios $(G_E^\ast/G_M^\ast)/(G_E/G_M)$ can be directly related to the polarization-transfer measurements of bound baryons. In the present work we estimate, for the first time, the double ratios $(G_E^\ast/G_M^\ast)/(G_E/G_M)$ for all the members of octet baryons in symmetric nuclear matter in the range $Q^2=0$--3 GeV$^2$, where $Q^2=- q^2$ with $q$ being the four-momentum transfer.