Thermodynamic correction to the strong interaction in the perturbative regime

China Center of Advanced Science & Technology (World Lab.) - Beijing 100080, PRC and Institute of High Energy Physics, CAS - 19B Yuquanlu, Beijing 100039, PRC and Center for Theoretical Physics, Laboratory for Nuclear Science and Department of Physics, Massachusetts Institute of Technology 77 Mass. Ave., Cambridge, MA 02139-4307, USA

Corresponding authors: gxpeng@ihep.ac.cn gxpeng@lns.mit.edu

Received: 29 March 2005
Accepted: 21 July 2005

Abstract

The properties of quark matter from perturbative QCD have thermodynamic inconsistencies. A thermodynamically determined new term can solve the problem, serving as a likely way from perturbative to non-perturbative effects. Consequently, quark matter can be self bound at about 4 times the normal nuclear saturation density, and the density behavior of sound velocity becomes opposite to the previous finding, which alters the mass-radius relation significantly to allow pulsars to be a candidate of quark stars.