ENTROPY IN SCALAR O(N) MODEL WITH A SPONTANEOUSLY BROKEN SYMMETRY

	ENTROPY IN SCALAR O(N) MODEL WITH A SPONTANEOUSLY BROKEN SYMMETRY
	Li BC(李宝春); Li, BC; Wang, LL
刊名	INTERNATIONAL JOURNAL OF MODERN PHYSICS A
	2009
卷号	24 期号:30 页码:5725-5736
关键词	Entropy scalar O(N) model spontaneously broken symmetry
通讯作者	[Li, Bao-Chun] Shanxi Univ, Dept Phys, Taiyuan 030006, Shanxi, Peoples R China ; [Li, Bao-Chun] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China ; [Wang, Li-Li] Shanxi Univ, Dept Math, Coll Business, Taiyuan 030031, Shanxi, Peoples R China
英文摘要	We investigate the entropy in a scalar O(N) model with a spontaneously broken symmetry. The Cornwall-Jackiw-Tomboulis formalism is applied to derive the entropy in the Hartree and Hartree-Fock approximations. In contrast to the Hartree approximation where the particles are quasiparticles with vanishing decay width, the Hartree-Fock approximation contains exchange contributions, which lead to nonzero decay width. We find that the sunset diagrams contribution is very small. Furthermore, the decay widths from these diagrams are discussed in the weak and strong coupling cases.
学科主题	Physics
类目[WOS]	Physics, Nuclear ; Physics, Particles & Fields
研究领域[WOS]	Physics
原文出处	SCI
语种	英语
WOS记录号	WOS:000272918000011
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/240043]
专题	高能物理研究所_理论物理室高能物理研究所_实验物理中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Li BC,Li, BC,Wang, LL. ENTROPY IN SCALAR O(N) MODEL WITH A SPONTANEOUSLY BROKEN SYMMETRY[J]. INTERNATIONAL JOURNAL OF MODERN PHYSICS A,2009,24(30):5725-5736.
APA	李宝春,Li, BC,&Wang, LL.(2009).ENTROPY IN SCALAR O(N) MODEL WITH A SPONTANEOUSLY BROKEN SYMMETRY.INTERNATIONAL JOURNAL OF MODERN PHYSICS A,24(30),5725-5736.
MLA	李宝春,et al."ENTROPY IN SCALAR O(N) MODEL WITH A SPONTANEOUSLY BROKEN SYMMETRY".INTERNATIONAL JOURNAL OF MODERN PHYSICS A 24.30(2009):5725-5736.