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Improved soft-wall model with a negative dilaton
Zuo F(左芬); Zuo, F
2010
发表期刊PHYSICAL REVIEW D
卷号82期号:8页码:86011
通讯作者[Zuo, Fen] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China ; [Zuo, Fen] Chinese Acad Sci, Theoret Phys Ctr Sci Facil, Beijing 100049, Peoples R China ; [Zuo, Fen] Chinese Acad Sci, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, Beijing 100190, Peoples R China
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.
文章类型Article
学科领域Astronomy & Astrophysics; Physics
研究领域[WOS]Astronomy & Astrophysics ; Physics
DOI10.1103/PhysRevD.82.086011
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语种英语
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000283052500008
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被引频次:27[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/311005/240833
专题理论物理室
作者单位中国科学院高能物理研究所
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Zuo F,Zuo, F. Improved soft-wall model with a negative dilaton[J]. PHYSICAL REVIEW D,2010,82(8):86011.
APA 左芬,&Zuo, F.(2010).Improved soft-wall model with a negative dilaton.PHYSICAL REVIEW D,82(8),86011.
MLA 左芬,et al."Improved soft-wall model with a negative dilaton".PHYSICAL REVIEW D 82.8(2010):86011.
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