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arXiv 0909.1534hep-ph
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有限温度QCD的全息方法:标量球和标量介子的情况

Holographic Approach to Finite Temperature QCD: The Case of Scalar Glueballs and Scalar Mesons

P. Colangelo, F. Giannuzzi, S. Nicotri

摘要:

在软壁全息QCD模型中研究了$T \neq 0$中的标量胶球和标量介子。我们发现,对于所有的温度值,使用Anti-de Sitter-黑洞度规,强子态的质量随着T的增加而减小,宽度随着T的增加而变宽,并且存在着标量胶球和标量介子谱函数中态消失的温度.然而,发生这种现象所对应的温度值很低,约为40-60 MeV。一个一致的全息描述介质中的强子性质的影响应该包括霍金-佩奇转变,分离阶段与反德西特度规在低温下的阶段与反德西特-黑洞度规在高温下。

英文摘要:

We study scalar glueballs and scalar mesons at $T \neq 0$ in the soft wall holographic QCD model. We find that, using the Anti-de Sitter-Black Hole metric for all values of the temperature, the masses of the hadronic states decrease and the widths become broader when T increases, and there are temperatures for which the states disappear from the scalar glueball and scalar meson spectral functions. However, the values of the temperatures in correspondence of which such phenomena occur are low, of the order of 40-60 MeV. A consistent holographic description of in-medium effects on hadron properties should include the Hawking-Page transition, which separates the phase with the Anti-de Sitter metric at small temperatures from the phase with Anti-de Sitter-Black Hole metric at high temperatures.

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