RHIC Au+Au碰撞中的$J/ψ$抑制：不同参与者数量下袋模型中的颜色筛选方案
$J/ψ$ suppression in Au+Au collisions at RHIC : colour screening scenario in the bag model at variable participant numbers
摘要：
通过适当地引入夸克-胶子等离子体（QGP）的袋模型状态方程，我们修正了Chu和Matsui的色屏蔽理论。我们还选择了压力参数化，而不是参数化的横向平面中的能量密度。我们假设QGP稠密介质在纵向膨胀服从Bjorken增强不变标度律。在这种情况下，还考虑了$χ_c$、$ψ^{'}$和$J/ψ$的顺序解链。我们将上述公式应用于最近RHIC Au + Au碰撞中$J/ψ$抑制的PHENIX实验数据。我们发现，该模型给出了一个很好的描述数据在中快速的生存概率与参与者的数量，而没有任何必要实施（3+1）维扩展的decofined介质。
英文摘要：
We have modified the colour screening theory of Chu and Matsui by properly incorporating bag model equation of state for quark gluon plasma (QGP). We have also chosen the pressure parametrization rather than parametrizing energy density in the transverse plane. We assume that the QGP dense medium is expanding in the longitudinal direction obeying Bjorken boost invariant scaling law. Sequential melting of $χ_c$, $ψ^{'}$ and $J/ψ$ is also considered in this scenario. We have applied above formulation to the recent PHENIX experimental data of $J/ψ$ suppression in Au + Au collisions at RHIC. We find that the model gives a good description of data at mid-rapidity in terms of survival probability versus number of participants without any necessity of implementing (3+1)-dimensional expansion of the deconfined medium.
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