"Figure 3a(pp)" of "Jet-Hadron Correlations in sqrt{s_{NN}} = 200 GeV Au+Au and p+p Collisions"

BNL-RHIC. Azimuthal angular correlations of charged hadrons with respect to the axis of a reconstructed (trigger) jet in Au+Au and p+p collisions at sNN−−−sqrt=200GeV in STAR are presented. The trigger jet population in Au+Au collisions is biased towards jets that have not interacted with the medium, allowing easier matching of jet energies between Au+Au and p+p collisions while enhancing medium effects on the recoil jet. The associated hadron yield of the recoil jet is significantly suppressed at high transverse momentum (passocT) and enhanced at low passocT in 0-20% central Au+Au collisions compared to p+p collisions, which is indicative of medium-induced parton energy loss in ultrarelativistic heavy-ion collisions.

本数据集源自布鲁克海文国家实验室相对论重离子对撞机（BNL-RHIC）。本文报道了STAR探测器（STAR）在质心系能量√s_NN=200 GeV的金核-金核（Au+Au）与质子-质子（p+p）碰撞中，带电强子相对于重建触发喷注轴线的方位角关联测量结果。金核-金核碰撞中的触发喷注样本偏向于未与介质发生相互作用的喷注，这使得金核-金核与质子-质子碰撞间的喷注能量匹配更为简便，同时强化了介质对反冲喷注的影响效应。相较于质子-质子碰撞，0-20%中心度的金核-金核碰撞中，反冲喷注的关联强子产额在高关联横向动量（passocT）下被显著压低，而在低关联横向动量下则有所增强，这一现象是超相对论重离子碰撞中介质诱导部分子能量损失的典型特征。