Centrality-dependent modification of jet-production rates in deuteron-gold collisions at sqrt(sNN) = 200 GeV
Centrality-dependent modification of jet-production rates in deuteron-gold collisions at sqrt(sNN) = 200 GeV
复制标题
sqrt(sNN) = 200 GeV 时氘核-金碰撞中射流产生速率的中心性修正
DOI：
10.1103/physrevlett.116.122301
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
et al. (PHENIX Collaboration)
中科院分区：
文献类型：
--
作者：
A. Adare;K. Shigaki;et al. (PHENIX Collaboration)
2008年，相对论重离子对撞机上的PHENIX探测器记录了在碰撞中测量的射流产生速率。利用反算法从电磁量热计中的能量沉积和多线比例室中的带电轨迹中重建射流，并根据探测器响应对射流横向动量谱进行校正。射流的光谱在伪快度范围内可接受为。发现0% - 100%事件的核修饰因子（）值一致，约束了初始状态效应对射流产生的作用。然而，中心性选择值和中心-外围比（）显示出与统一性有很大的、依赖的偏差，挑战了涉及核碰撞的硬过程速率和软粒子产生的传统模型。
Jet production rates are measured inandcollisions atrecorded in 2008 with the PHENIX detector at the Relativistic Heavy Ion Collider. Jets are reconstructed using theanti-algorithm from energy deposits in the electromagnetic calorimeter and charged tracks in multiwire proportional chambers, and the jet transverse momentum () spectra are corrected for the detector response. Spectra are reported for jets with, within a pseudorapidity acceptance of. The nuclear-modification factor () values for 0%–100%events are found to be consistent with unity, constraining the role of initial state effects on jet production. However, the centrality-selectedvalues and central-to-peripheral ratios () show large,-dependent deviations from unity, challenging the conventional models that relate hard-process rates and soft-particle production in collisions involving nuclei.