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ENTROPY IN SCALAR O(N) MODEL WITH A SPONTANEOUSLY BROKEN SYMMETRY
Li BC(李宝春); Li, BC; Wang, LL
2009
发表期刊INTERNATIONAL JOURNAL OF MODERN PHYSICS A
卷号24期号:30页码:5725-5736
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
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.
文章类型Article
关键词Entropy scalar O(N) model spontaneously broken symmetry
学科领域Physics
研究领域[WOS]Physics
DOI10.1142/S0217751X09047363
URL查看原文
语种英语
WOS类目Physics, Nuclear ; Physics, Particles & Fields
WOS记录号WOS:000272918000011
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被引频次:7[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/240043
专题理论物理室
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.
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