论文标题
改进的颜色蒸发模型中PB+PB碰撞中的Quarkonium极化
Quarkonium polarization in Pb+Pb collisions in the improved color evaporation model
论文作者
论文摘要
我们将直接$ j/ψ$生成的计算在$ {\ Mathcal O}（α_s^3）$的共线分解中以PB+PB碰撞为中。包括Parton密度的核修饰和固有横向动量拓宽的冷核问题。我们发现极化与这些影响无关。将我们的计算与Alice协作在$ \ sqrt {s_ {nn}} = 5.02 $ TEV提取的PB+PB极化参数进行了比较。
We apply our calculation of direct $J/ψ$ production in the improved color evaporation mode at ${\mathcal O}(α_s^3)$ in collinear factorization to Pb+Pb collisions. The cold nuclear matter effects of nuclear modifications of the parton densities and intrinsic transverse momentum broadening are included. We find that the polarization is independent of these effects. Our calculations are compared to the Pb+Pb polarization parameters extracted by the ALICE Collaboration at $\sqrt{s_{NN}} = 5.02$ TeV.
