Weak interactions and the gravitational collapse
Abstract
The chart of nuclei could be enlarged with a branch describing neutron stars that are huge nuclei of a few solar masses held together by gravity force and sustained by the pressure due to the degenerate Fermi sea. We contend in this manuscript that yet another branch could be added: objects with a large weak charge, with masses around solar masses and having radii of a few meters, very compact, only slightly larger than their Schwarzchild radius, and sustained by the pressure generated by the weak force due to exchange. This interaction, insignificant in normal neutron stars, could become dominant when ultrahigh densities are reached due to the action of gravity and lead to stable configurations if the appropriate conditions are met. They would constitute a physical realization of the equation of state proposed by Zeldovich some decades ago.
Cite
@article{arxiv.2510.24800,
title = {Weak interactions and the gravitational collapse},
author = {Domenec Espriu},
journal= {arXiv preprint arXiv:2510.24800},
year = {2026}
}
Comments
A relevant numerical error was found and further analysis is called for. Eq. 44 is incorrect and this makes the pressure and energy of the relativistic fermion gas (discussed in the follow-up of the said equation) relevant