1、QCD phase transition and structure of compact stars,G X Peng,IntroductionEOS of quark matterEOS of nuclear matterPrelimiary results for the structure of neutron stars,Graduate University of Chinese Academy of SciencesInstitite of High Energy Physics, CASThe National Natural Science Foundation of Chi
2、na,, 86-10-88233565,Introduction,道可道，非常道，名可名，非常名。无名，天地之始；有名，万物之母。故常无，欲以观其妙；常有，欲以观其徼。此两者，同出而异名，同谓之玄；玄之又玄，众妙之门。,nm,qm,Vqm/Vtot,Gibbs Conditions 吉布斯条件,道可道，非常道，名可名，非常名。无名，天地之始；有名，万物之母。故常无，欲以观其妙；常有，欲以观其徼。此两者，同出而异名，同谓之玄；玄之又玄，众妙之门。,道可道，非常道，名可名，非常名。无名，天地之始；有名，万物之母。故常无，欲以观其妙；常有，欲以观其徼。此两者，同出而异名，同谓之玄；玄之又玄，众妙之门
3、。,Conservation laws 守恒律,1. Baryon number,2. Electric charge,EOS of quark matter,Bag model: the simplest?NJL model: no confinement?Confinement-by-quark-mass model G.X.Peng,A.Li, U.Lombardo, PRC77(2008)065807Self-consistent running coupling model (SCRC),Nonperturbative effects,RG dependence of QCD run
4、ning coupling & quark masses,Matching-invariant beta and gamma functions,RG dependence of QCD running coupling,G.X.Peng, PLB 634:413,Fastest convergent expression for the running coupling,G.X.Peng, PLB 634:413,QCD scale Lambda,QCD mass scales,Comparison of the coupling & quark masses,Fastest converg
5、ent expression for the running coupling,G.X.Peng, PLB 634 (2006) 413,Thermodynamically consistent quark model,Thermodynamically consistent quark model,One-flavor case,Energy per quark as a function of density,G.X.Peng, EPL 72 (2005) 69,Density dependence of bag constant,EPL 72 (2005) 69,Velocity of
6、sound in quark matter,EPL 72 (2005) 69,Mass-radius relation of quark stars,G.X.Peng, EPL 72:69,EOS of nuclear matter 核物质态方程,Hagedorn factor Bruekner-Hatree-Fock Relativistic Mean Field ,Hagedorn Factor,Brueckner-Hatree-Fock with three-body forces,W.Zuo et.al. EPJA14(02)469, L.G.Cao et.al. PRC (06),P
7、hase structure,Present model indicates that mixed phases ofnuclear and quark matter appears, in the neutron star conditions, at a density a little bit above thenuclear saturation, and transit to pure quark phase at about six times the saturation. Therefore, a quarkphase seems favorite in neutron sta
8、rs. It hinders the appearance of kaon condensation.,Summary,Two-types of compact stars,The end,道可道，非常道，名可名，非常名。无名，天地之始；有名，万物之母。故常无，欲以观其妙；常有，欲以观其徼。此两者，同出而异名，同谓之玄；玄之又玄，众妙之门。,谢谢,中国科学院高能物理研究所,P.O.Box 918-4, Beijing 100039, , 010-88233565,Beijing electron-positron colider,中国科学院高能物理研究所,羊八井国际宇宙线观察站,THE END,
