| ENTROPY IN SCALAR O(N) MODEL WITH A SPONTANEOUSLY BROKEN SYMMETRY |
| Li BC(李宝春); Li, BC; Wang, LL
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| 2009
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| 发表期刊 | INTERNATIONAL JOURNAL OF MODERN PHYSICS A
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| 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
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| 文章类型 | Article
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| 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. |
| 关键词 | Entropy
scalar O(N) model
spontaneously broken symmetry
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| 学科领域 | Physics
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| DOI | 10.1142/S0217751X09047363
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| URL | 查看原文
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| 语种 | 英语
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| WOS研究方向 | Physics
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| WOS类目 | Physics, Nuclear
; Physics, Particles & Fields
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| WOS记录号 | WOS:000272918000011
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://ir.ihep.ac.cn/handle/311005/240043
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| 专题 | 理论物理室
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| 作者单位 | 中国科学院高能物理研究所
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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.
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| 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.
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| 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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