论文标题
径向流对在$ \ sqrt {s_ {s_ {nn}} = $ 5.02 TEV的p-pb碰撞中的中间$ p_ {t} $在中间$ p_ {t} $处的两个粒子相关的影响
Effect of radial flow on two particle correlations with identified triggers at intermediate $p_{T}$ in p-Pb collisions at $\sqrt{s_{NN}} = $ 5.02 TeV
论文作者
论文摘要
从确定的触发器（p/$ \ \ bar {p} $））和未识别的电荷粒子（$ p_ {t} $）中的两粒子相关性的结果（p/$ \ bar {p} $））和未识别的带电粒子在$ \ s________________________时提出。已经分析了从混合蒙特卡洛事件发生器（EPOS 3.107）产生的事件，该事件在实现磁通管初始条件下进行了事件3+1D粘性流体动力学进化，以计算以$δη$δ$ $δη$ $δ$ $δη$。在小相对角（射流样相关）处的角相关性的强度，根据事件多重性的函数计算了近距射流样的每触发率的量化。与Pion触发器相关的产率表现出可忽略的多样性依赖性，而质子触发的产率显示出从低到高多样性事件的逐渐抑制。在诸如P-PB的小碰撞系统中，预计射流修饰的主导地位较小，观察到的抑制可能与产生外向径向流动的大体系统的流体动力学演化有关。 RHIC能量的Au-Au碰撞中的类似测量表明，质子触发的相关性的稀释迹象表明，P-PB和重离子碰撞中的软物理过程可能具有定性的相似性。
Results from the two-particle correlation between identified triggers (pions ($π^{\pm}$) , protons (p/$\bar{p}$))) and un-identified charged particles at intermediate transverse momentum ($p_{T}$) in p-Pb collisions at $\sqrt{s_{NN}} = $ 5.02 TeV have been presented. The events generated from a hybrid Monte-Carlo event generator, EPOS 3.107 that implements a flux-tube initial conditions followed by event by event 3+1D viscous hydrodynamical evolution, have been analysed to calculate two-dimensional correlation functions in $Δη$-$Δϕ$. The strength of angular correlations at small relative angles (jet-like correlations), quantified in terms of near-side jet-like per-trigger yield has been calculated as a function of the event multiplicity. The yield associated with pion triggers exhibit negligible multiplicity dependence, while the proton-triggered yield shows a gradual suppression from low to high multiplicity events. In small collision systems like p-Pb where jet modification is expected to be less dominant, the observed suppression may be associated with the hydrodynamical evolution of the bulk system that generates an outward radial flow. Analogous measurements in Au-Au collisions at RHIC energy have shown a hint of dilution in proton-triggered correlation at its highest multiplicity suggesting that the soft physics processes in p-Pb and heavy ion collisions may have qualitative similarity.
