https://doi.org/10.1051/epjconf/202225904002
Heavy-quark effects on cold quark matter and self-bound stars
1 Instituto de Física, Universidade de São Paulo, Rua do Matão, 1371, Butantã, 05508-090, São Paulo, SP, Brazil
2 Instituto de Física, Universidade Federal do Rio de Janeiro, Caixa Postal 68528, 21941-972, Rio de Janeiro, RJ, Brazil
* e-mail: jimenez@if.usp.br
** e-mail: fraga@if.ufrj.br
Published online: 1 February 2022
The heavy-quark effects on the equation of state for cold and dense quark matter are obtained from perturbative QCD, yielding observables parametrized only by the renormalization scale. In particular, we investigate the thermodynamics of charm quark matter under the constraints of β equilibrium and electric charge neutrality in a region of densities where perturbative QCD is, in principle, much more reliable. Finally, we analyze the stability of charm stars, which might be realized as a new branch of ultradense hybrid compact stars, and find that such self-bound stars are unstable under radial oscillations.
© The Authors, published by EDP Sciences, 2022
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
