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arXiv 0908.2856hep-phhep-latnucl-th
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有限温度下的重夸克偶素关联函数:QCD求和规则方法

Heavy quarkonium correlators at finite temperature: QCD sum rule approach

Kenji Morita, Su Houng Lee

摘要:

我们利用QCD求和规则详细研究了有限温度下重夸克偶素的性质。扩展以前的分析,我们考虑到温度依赖的有效连续阈值,并推导出的质量,宽度和不同的有效连续阈值的约束。我们发现,至少有一个这些数量的charmonium突然改变附近的相变。通过构造一个模型谱函数,我们计算了虚时间相关子与其重构的虚时间相关子之比$G/G_{\text{rec}}$,并与相应的格点量子色动力学结果进行了比较。我们证明了$G/G_{\text{rec}}$的几乎恒定的统一性可以从QCD求和规则中提取的光谱修改的每个部分的变化的破坏性相互作用中获得。

英文摘要:

We investigate the properties of heavy quarkonia at finite temperature in detail using QCD sum rules. Extending previous analyses, we take into account a temperature dependent effective continuum threshold and derive constraints on the mass, the width, and the varying effective continuum threshold. We find that at least one of these quantities of a charmonium changes abruptly in the vicinity of the phase transition. We also calculate the ratio of the imaginary time correlator to its reconstructed one, $G/G_{\text{rec}}$, by constructing a model spectral function and compare it to the corresponding lattice QCD results. We demonstrate that the almost constant unity of $G/G_{\text{rec}}$ can be obtained from the destructive interplay of the changes in each part of the spectral modification which are extracted from QCD sum rules.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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