THE PHYSICS OF ELEMENTARY PARTICLES AND FIELDS |
|
|
|
|
Quark Stars Investigated using an Improved Quasi-Particle Model |
YAN Yan1, CAO Jing2, LUO Xin-Lian2, SUN Wei-Min3, ZONG Hong-Shi3** |
1Department of Physics, Nanjing University, Nanjing 210093 2Department of Astronomy, Nanjing University, Nanjing 210093 3Joint Center for Particle, Nuclear Physics and Cosmology, Nanjing 210093
|
|
Cite this article: |
YAN Yan, CAO Jing, LUO Xin-Lian et al 2012 Chin. Phys. Lett. 29 101201 |
|
|
Abstract The equation of state (EOS) of cold and dense strongly interacting matter is crucial for better research of compact stars, i.e., neutron stars and quark stars. We generalize our improved quasi-particle model from finite temperature and zero chemical potential [Phys. Lett. B 711 (2012) 65] to the case of zero temperature and finite chemical potential to obtain an EOS of our improved quasi-particle model and then apply this EOS to study the structure of a quark star. The results are consistent with the most recent astronomical observational data.
|
|
Received: 26 June 2012
Published: 01 October 2012
|
|
|
|
|
|
[1] ?zel F 2006 Nature 441 1115 [2] Alford M et al 2007 Nature 445 E7 [3] Gell-Mann M 1964 Phys. Lett. 8 214 [4] Zweig G 1964 CERN Report No. TH-401 [5] Zweig G 1964 CERN Report No. TH-412 [6] Witten E 1984 Phys. Rev. D 30 272 [7] Chodos A, Jaffe R L, Johnson K, Thorn C B and Weisskopf V F 1974 Phys. Rev. D 9 3471 [8] Weber F 1999 Pulsars as Astrophysical Laboratoriers for Nuclear and Particle Physics, High Energy Physics, Cosmology and Graviation Series (Bristol, IOP publishing) [9] Peshier A, Kampfer B and Soff G 2000 Phys. Rev. C 61 045203 [10] Alford M, Braby M, Paris M and Reddy S 2005 Astrophys. J. 629 969 [11] Menezes D P, Providě C and Melrose D B 2006 J. Phys. G 32 1081 [12] Fraga E S, Pisarski R D and Schaffner-Bielich J 2001 Phys. Rev. D 63 121702 [13] Tian Y L, Yan Y, Li H, Luo X L and Zong H S 2012 Phys. Rev. D 85 045009 [14] Zhao A M, Cao J, Luo L J, Sun W M and Zong H S 2010 Mod. Phys. Lett. A 25 47 [15] Peshier A, Kampfer B, Pavlenko O P and Soft G 1994 Phys. Lett. B 337 235 [16] Gorenstein M I and Yang S N 1995 Phys. Rev. D 52 5206 [17] Bannur V M 2007 Eur. Phys. J. C 50 629 Bannur V M 2007 Phys. Lett. B 647 271 Bannur V M 2007 J. High Energy Phys. 09 046 Bannur V M 2008 Phys. Rev. C 78 045206 [18] Cao J, Jiang Y, Sun W M and Zong H S 2012 Phys. Lett. B 711 65 [19] Walecka J D 1995 Theoretical Nuclear and Subnuclear Physics (New York: Oxford University Press) chap 16 [20] Halasz M A, Jackson A D, Shrock R E, Stephanov M A and Verbaarschot J J M 1998 Phys. Rev. D 58 096007 [21] Demorest P B, Pennucci T, Ransom S M, Roberts M S E and Hessels J W T 2010 Nature 467 1081 [22] Steiner A W, Lattimer J M and Brown E F arXiv:1005.0811 [astro-ph.HE] |
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|