Calculation of Quark-Number Susceptibility at Finite Chemical Potential and Temperature

CORC > 紫金山天文台 > 中国科学院紫金山天文台 > 太阳和太阳系等离子体研究团组

	Calculation of Quark-Number Susceptibility at Finite Chemical Potential and Temperature
	Cao Jing 1; Zhao A-Meng 1; Luo Liu-Jun 1; Sun Wei-Min 1,2; Zong Hong-Shi 1,2
刊名	CHINESE PHYSICS LETTERS
	2010-03-01
卷号	27 期号:3 页码:031201'
关键词	EQUATION-OF-STATE GLUON PLASMA LATTICE QCD MODEL FLUCTUATION PARAMETER
ISSN号	0256-307X
英文摘要	We use the direct method proposed by He et al. (Phys. Lett. B 680 (2009) 432) to calculate the quark-number susceptibility (QNS) at finite temperature and the chemical potential in the quasi-particle model. In our approach the QNS is given by a formula solely involving the dressed quark propagator at finite chemical potential mu and temperature T. The QNS at finite mu and T is calculated in the quasi-particle model. It is found that at high temperatures the QNS tends to the ideal quark gas result. At very small temperatures the QNS vanishes. This vanishing behavior in the low-temperature region is consistent with the lattice results. For mu is an element of [0, 180] MeV, our results show that there exists a rapid increase of QNS near some temperatures. The temperature at which the rapid increase occurs shifts to smaller values with the increasing quark chemical potential. This rapid increase could be regarded as a signal of a crossover.
学科主题	Physics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Physics, Multidisciplinary
研究领域[WOS]	Physics
关键词[WOS]	EQUATION-OF-STATE ; GLUON PLASMA ; LATTICE QCD ; MODEL ; FLUCTUATION ; PARAMETER
收录类别	SCI
语种	英语
WOS记录号	WOS:000275376200021
公开日期	2011-11-23
内容类型	期刊论文
源URL	[http://159.226.72.40/handle/332002/1107]
专题	紫金山天文台_太阳和太阳系等离子体研究团组
作者单位	1.Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China 2.Nanjing Univ Purple Mt Observ, Joint Ctr Particle Nucl Phys & Cosmol, Nanjing 210093, Peoples R China
推荐引用方式 GB/T 7714	Cao Jing,Zhao A-Meng,Luo Liu-Jun,et al. Calculation of Quark-Number Susceptibility at Finite Chemical Potential and Temperature[J]. CHINESE PHYSICS LETTERS,2010,27(3):031201'.
APA	Cao Jing,Zhao A-Meng,Luo Liu-Jun,Sun Wei-Min,&Zong Hong-Shi.(2010).Calculation of Quark-Number Susceptibility at Finite Chemical Potential and Temperature.CHINESE PHYSICS LETTERS,27(3),031201'.
MLA	Cao Jing,et al."Calculation of Quark-Number Susceptibility at Finite Chemical Potential and Temperature".CHINESE PHYSICS LETTERS 27.3(2010):031201'.