Pion stars embedded in neutrino clouds
High Energy Physics - Phenomenology
2023-06-28 v1 General Relativity and Quantum Cosmology
Abstract
We study self-gravitating multi-pion systems (pion stars) in a state of the Bose condensate. To ensure stability of such stars, it is assumed that they are immersed in the lepton background. Two different phenomenological equations of state (EoS) for the pion matter are used, some of them having the first order phase transition. The model parameters are chosen to reproduce the recent lattice QCD data at zero temperature and large isospin chemical potential. It is shown that the mass-radius diagrams of pion stars obtained with phenomenological EoS are close to ones calculated in the ideal gas model. We analyze properties of neutrino clouds which are necessary for stabilizing the pion stars.
Keywords
Cite
@article{arxiv.2303.06190,
title = {Pion stars embedded in neutrino clouds},
author = {O. S. Stashko and O. V. Savchuk and L. M. Satarov and I. N. Mishustin and M. I. Gorenstein and V. I. Zhdanov},
journal= {arXiv preprint arXiv:2303.06190},
year = {2023}
}