Study of charmoium dissociation temperatures in finite temperature lattice QCD

J/psi、psi ′和chi_c态的离解温度在高能重离子碰撞J/psi抑制方案中起着关键作用。研究了猝灭格点QCD中粲偶素的离解温度。然后，我们提取地面和第一激发态质量对角化之间的相关函数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，并研究了它们的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，没有迹象表明散射状态高达约2 Tc。

Dissociation temperatures of J/psi, psi', and chi_c states play key roles in the sequential J/psi suppression scenario for high energy heavy ion collisions. We study charmonium dissociation temperatures in quenched lattice QCD. 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 2Tc.