# Do Delta Baryons Play a Role in Neutron Stars?

## TL;DR

This paper investigates the role of delta baryons in neutron stars and finds that many-body forces prevent their appearance in dense nuclear matter within a specific theoretical model.

## Contribution

It demonstrates that many-body forces in the quark-meson coupling model inhibit delta isobars in neutron star cores.

## Key findings

- Many-body forces prevent delta isobars in dense matter.
- Quark structure changes influence neutron star composition.
- Results impact understanding of neutron star internal composition.

## Abstract

The presence of exotic hadrons, such as hyperons and $\Delta$ isobars, in the dense nuclear matter in their cores has been shown to produce important changes in the properties of neutron stars. Within the quark-meson coupling model, we show that the many-body forces generated by the change in the internal quark structure of the baryons in the strong scalar mean fields generated in dense nuclear matter prohibit the appearance of $\Delta$ isobars.