# Neutron stars: the equation of state, superconductivity/superfluidity and transport coefficients (PHAROS WG1+WG2 meeting)

Sep 26 – 28, 2018
Department of Physics (University of Coimbra)
Europe/Lisbon timezone

## Effects of the tetraneutron condensation in neutron stars

Sep 26, 2018, 5:30 PM
20m
Room E10A

### Speaker

Dr Oleksii Ivanytskyi (University of Salamanca)

### Description

Based on recent experimental and theoretical hints on possible formation of a resonant four-neutron system we study effects of appearance of such a cluster in neutron rich baryon matter inside NSs. For this purpose we employ a relativistic mean field approach which includes nucleons, $\Delta$-baryons as well as light nuclear clusters. Our analysis demonstrates that tetraneutrons existing as the Bose-Einstein condensate can affect the equation of state of cold baryonic matter and observable characteristics of neutrons stars. Tetraneutron driven suppression of $\Delta$-baryons is another important result of our study. Influence of tetraneutrons on formation of superconducting phase is also discussed.

### Primary authors

Dr Oleksii Ivanytskyi (University of Salamanca) Prof. Conrado Albertus Torres (University of Salamanca) M. Angeles Perez-Garcia (University of Salamanca and IUFFyM)