Naslov
Neutron star mass limit at 2M_sun supports the existence of a CEP

Autori
Alvarez-Castillo, David Edwin ; Benić, Sanjin ; Blaschke, David ; Han, Sophia ; Typel, Stefan

Izvornik
European physical journal A : hadrons and nuclei (1434-6001) 52 (2016); 232-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
neutron stars ; phase transition ; quark matter

Sažetak
We point out that the very existence of a “horizontal branch” in the mass-radius characteristics for neutron stars indicates a strong first-order phase transition and thus supports the existence of a critical endpoint (CEP) of first-order phase transitions in the QCD phase diagram. This branch would sample a sequence of hybrid stars with quark matter core, leading to the endpoint of stable compact star configurations with the highest possible baryon densities. Since we know of the existence of compact stars with 2M_sun, this hypothetical branch has to lie in the vicinity of this mass value, if it exists. We report here a correlation between the maximal radius of the horizontal branch and the pressure at the onset of hadron- to-quark matter phase transition, which is likely to be a universal quantity of utmost relevance to the upcoming experiments with heavy-ion collisions at NICA and FAIR.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA