Self-bound interacting QCD matter in compact stars
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
01/11/2013
01/11/2013
2012
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Resumo |
The quark gluon plasma (QGP) at zero temperature and high baryon number is a system that may be present inside compact stars. It is quite possible that this cold QGP shares some relevant features with the hot QGP observed in heavy ion collisions, being also a strongly interacting system. In a previous work we have derived from the QCD Lagrangian an equation of state (EOS) for the cold QGP, which can be considered an improved version of the MIT bag-model EOS. Compared to the latter, our EOS reaches higher values of the pressure at comparable baryon densities. This feature is due to perturbative corrections and also to nonperturbative effects. Here we apply this EOS to the study of neutron stars, discussing the absolute stability of quark matter and computing the mass-radius relation for self-bound (strange) stars. The maximum masses of the sequences exceed two solar masses, in agreement with the recently measured values of the mass of the pulsar PSR J1614-2230, and the corresponding radii of around 10-11 km. CAPES CAPES CNPq CNPq FAPESP FAPESP |
Identificador |
PHYSICAL REVIEW D, COLLEGE PK, v. 86, n. 6, supl. 2, Part 3, pp. 1522-1527, SEP 25, 2012 1550-7998 http://www.producao.usp.br/handle/BDPI/37443 10.1103/PhysRevD.86.065031 |
Idioma(s) |
eng |
Publicador |
AMER PHYSICAL SOC COLLEGE PK |
Relação |
PHYSICAL REVIEW D |
Direitos |
openAccess Copyright AMER PHYSICAL SOC |
Palavras-Chave | #NEUTRON-STAR #QUARK MATTER #RADIUS #MASS #ASTRONOMY & ASTROPHYSICS #PHYSICS, PARTICLES & FIELDS |
Tipo |
article original article publishedVersion |