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arXiv 0910.3098hep-lathep-ph
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粲偶素关联函数和有限温度下的谱函数

Charmonium correlators and spectral functions at finite temperature

H. -T. Ding, O. Kaczmarek, F. Karsch, H. Satz, W. Soeldner

摘要:

我们在0.75 Tc和1.5 Tc的各向同性极细晶格(0.015 fm)上用Clover改进的Wilson费米子研究了猝灭QCD中的粲偶素关联函数和谱函数。我们使用一种新的方法来区分零模的贡献从其他的贡献。一旦将其去除,我们发现关联函数与重构的关联函数的比率在所有距离处几乎保持为1。在0.75 Tc得到的谱函数的基态峰是可靠的和稳健的。目前的准确性和有限数量的点在时间方向上在1.5 Tc不允许一个可靠的结论有关的可能熔化的粲偶素状态的QGP。

英文摘要:

We study charmonium correlators and spectral functions in quenched QCD, using Clover improved Wilson fermions on very fine (0.015 fm) isotropic lattices at 0.75 Tc and 1.5 Tc. We use a new approach to distinguish the zero mode contribution from the other contributions. Once this is removed, we find that the ratios of correlators to reconstructed correlators remain almost unity at all distances. The ground state peaks of spectral functions obtained at 0.75 Tc are reliable and robust. The present accuracy and limited number of points in the temporal direction at 1.5 Tc do not allow for a reliable conclusion about a possible melting of charmonium states in the QGP.

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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