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arXiv 0810.1567hep-lat
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格点量子色动力学中粲偶素离解温度的有限体积方法

Charmonium dissociation temperatures in lattice QCD with a finite volume technique

T. Umeda, H. Ohno, K. Kanaya

摘要:

在高能重离子碰撞中,J/π、π '和χ_c态的离解温度在J/π抑制方案中起着关键作用.本文研究了猝灭格点量子色动力学中粲偶素的离解温度。在各向异性晶格中,我们首先减去有限温度介子介子激发子中的常数模的影响,这在以前的研究中导致了非物理的结果。然后,我们提取地面和第一激发态质量对角化关联函数之间的不同的源和汇运营商。为了区分束缚态和散射态,我们首先比较了不同空间边界条件下的粲偶素质谱,并考察了它们的Bethe-Salpeter波函数的形状和体积依赖性。从这些研究中,我们发现到目前为止,没有迹象表明散射态高达约2.3T_c。

英文摘要:

Dissociation temperatures of J/ψ, ψ', and χ_c states play key roles in the sequential J/ψsuppression scenario for high energy heavy ion collisions. We report on a study of charmonium dissociation temperatures in quenched lattice QCD. On anisotropic lattices, we first subtract the effects of the constant mode in finite temperature meson correlators, which have lead to unphysical results in previous studies. We then extract ground and first exited state masses by diagonalizing correlation functions among different source and sink operators. To distinguish bound states from scattering states, we first compare the charmonium mass spectra under different spatial boundary conditions, and examine the shape and the volume-dependence of their Bethe-Salpeter wave functions. From these studies, we found so far no sign of scattering states up to about 2.3T_c.

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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