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题名: Improved soft-wall model with a negative dilaton
作者: Zuo, Fen
刊名: PHYSICAL REVIEW D
出版日期: 2010
卷号: 82, 期号:8, 页码:-
关键词: ADS/QCD ;  TRANSITION ;  STRINGS
学科分类: Physics
通讯作者: Zuo, F , Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
部门归属: [Zuo, F] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China; [Zuo, F] Chinese Acad Sci, Theoret Phys Ctr Sci Facil, Beijing 100049, Peoples R China; [Zuo, F] Chinese Acad Sci, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, Beijing 100190, Peoples R China
英文摘要: I propose to change the sign of the dilaton in the infrared (IR) soft-wall anti-de Sitter/QCD model, in order to implement confinement. The deformed model exhibits interesting properties, especially in describing chiral symmetry breaking. The expectation value of the scalar field X, which determines the quark mass and condensate, approaches a constant in the IR limit, rather than blows up in the original model. In contrast to the estimate in [M. Shifman and A. Vainshtein, Phys. Rev. D 77, 034002 (2008).], this kind of solution will not lead to chiral symmetry restoration for highly-excited states due to the property of the harmonic-oscillator equation. Instead, it will guarantee the Regge behavior of the axial meson spectrum and also the pseudoscalar mesons. The value of the condensate can be fixed by requiring that the pion be massless in the chiral limit, but only under some approximation in the present model. We also find that, by relaxing the IR boundary conditions, the unphysical massless state in the vector channel can be eliminated.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000283052500008
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5028
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Zuo, Fen. Improved soft-wall model with a negative dilaton[J]. PHYSICAL REVIEW D,2010,82(8):-.
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