论文标题
$ \ sqrt {s} $ = 13 tev的PP碰撞中的Midprapities J/$ψ$生产的多重性依赖性
Multiplicity dependence of J/$ψ$ production at midrapidity in pp collisions at $\sqrt{s}$ = 13 TeV
论文作者
论文摘要
包含J/$ψ$产量的测量结果是带电的颗粒伪型密度$ {\ rm d} n _ {\ rm ch}/\ rm ch}/\ rm {d}η$在$ \ s} $ = 13 tev in pp collisions in PP碰撞中，与Alice报告了Alice。 dielectron频道中的J/$ψ$ MESON收益率以中期（$ | y | <0.9 $）测量，用于基于Midprapitive（$ | |η| <1 $）和前向快速性（$ -3.7 <η<-1.7 $ and $ 2.8 $和$ 2.8 $ and $ 2.8 <5.1 $）选择的事件。在最小偏差事件中，两个可观察物均标准化其相应平均值。归一化的J/$ψ$收益率的增加，并具有归一化$ {\ rm d} n _ {\ rm ch}/\ rm {d}η$比线性更强大，并且依赖于横向动量。将数据与理论预测进行比较，这些预测很好地描述了观察到的趋势，尽管并非总是定量的。
Measurements of the inclusive J/$ψ$ yield as a function of charged-particle pseudorapidity density ${\rm d}N_{\rm ch}/\rm{d}η$ in pp collisions at $\sqrt{s}$ = 13 TeV with ALICE at the LHC are reported. The J/$ψ$ meson yield is measured at midrapidity ($|y|<0.9$) in the dielectron channel, for events selected based on the charged-particle multiplicity at midrapidity ($|η|<1$) and at forward rapidity ($-3.7<η<-1.7$ and $2.8<η<5.1$); both observables are normalized to their corresponding averages in minimum bias events. The increase of the normalized J/$ψ$ yield with normalized ${\rm d}N_{\rm ch}/\rm{d}η$ is significantly stronger than linear and dependent on the transverse momentum. The data are compared to theoretical predictions, which describe the observed trends well, albeit not always quantitatively.
