Strange matter and strange stars in a thermodynamically self-consistent perturbation model with running coupling and running strange quark mass

Abstract

A quark model with running coupling and running strange quark mass, which is thermodynamically self-consistent at both high and lower densities, is presented and applied to study properties of strange quark matter and structure of compact stars. An additional term to the thermodynamic potential density is determined by meeting the fundamental differential equation of thermodynamics. It plays an important role in comparatively lower density and ignorable at extremely high density, acting as a chemical-potential dependent bag constant. In this thermodynamically enhanced perturtative QCD model, strange quark matter still has the possibility of being absolutely stable, while the pure quark star has a sharp surface with a maximum mass as large as about 2 times the solar mass and a maximum radius of about 11 kilometers.

Electrically charged strange stars with an interacting quark matter equation of state

“…During the last years, several phenomenological models have been proposed to describe the EoS for the deconfined quark system, considering different assumptions and approximations for the description of the interaction between quarks, as well as for the treatment of the running quark masses and coupling constant (see, e.g., Refs. [17][18][19][20][21][22][23][24][25][26][27][28]). In particular, in Ref.…”

From strangelets to strange stars: a unified description

“…If true, there should exist stable objects of SQM with the baryon number A ranging from a few to ∼10 57 . Customarily, small SQM nuggets with A 10 7 are often referred to as strangelets [3][4][5][6][7][8][9][10], or slets [11], while stars consisting of SQM are called strange (quark) stars [12][13][14][15][16][17][18][19][20][21], being possible candidates for pulsars.…”

Constraining quark-hadron interface tension in the multimessenger era

“…At present, it is not clear how the renormalization scale Λ evolves with the chemical potentials of quarks, where many possibilities exist [98,101]. In this work, we adopt the following formalism:…”