Europhys. Lett.
Volume 72, Number 1, October 2005
Page(s) 69 - 75
Section The physics of elementary particles and fields
Published online 17 August 2005
Europhys. Lett., 72 (1), pp. 69-75 (2005)
DOI: 10.1209/epl/i2005-10189-8

Thermodynamic correction to the strong interaction in the perturbative regime

G. X. Peng

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

received 29 March 2005; accepted in final form 21 July 2005
published online 17 August 2005

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.

12.39.-x - Phenomenological quark models.
12.38.Bx - Perturbative calculations.
26.60.+c - Nuclear matter aspects of neutron stars.

© EDP Sciences 2005