论文标题
通过Phenix通过两粒子相关性和高$ p_t $ hadrons in $ a+a $ collisisions测量的中等喷气机修改
In-Medium Jet Modification Measured by PHENIX Via two-particle Correlations and High $p_T$ Hadrons in $A+A$ Collisions
论文作者
论文摘要
通过抑制单个高$ p_t $ hADRON $ r_ {aa} $，在RHIC观察到喷射淬火的第一个证据，以及在两粒子相关性中脱离客场喷射峰的消失。从那时起，强子$ r_ {aa} $，两粒子相关性仍然是重离子碰撞中QGP的有用探针，因为所涉及的粒子是在初始硬散射中产生的JET的片段。 Phenix最近改善了从$π^0 $ - hAdron相关性提取的宽度测量值，删除了基础事件减法中的高阶流量项。与高$ p_t $中性亲相关的客场射流的测量结果表明，低动量颗粒产生的较大角度与能量损失的理论期望一致。在近几个碰撞系统中，在高$ p_t $中测量了绝对产量和$ r_ {aa} $，在近几个碰撞系统中，包括$ u+u+u $ $ $ u $和$ cu+au $，进一步研究了能源损失的系统大小依赖性。这些程序将介绍最新的Phenix $ r_ {aa} $和两粒子相关测量及其在我们对喷气淬火和中等反应中的作用中的作用
The first evidence of jet quenching was observed at RHIC via suppression of single high $p_T$ hadron $R_{AA}$ and the disappearance of the away-side jet peak in two-particle correlations. Since then, hadron $R_{AA}$ and two-particle correlations continue to be useful probes of the QGP in heavy ion collisions, since the particles involved are fragments of the jets produced in the initial hard scattering. PHENIX recently improved the width measurements extracted from $π^0$-hadron correlations after removing the higher order flow terms in the underlying event subtraction. Measurements of the away-side jet correlated with high $p_T$ neutral pions show an increase in low momentum particle production at wide angles consistent with theoretical expectations for energy loss. The system size dependence of energy loss is further investigated at PHENIX by measuring the absolute yield and $R_{AA}$ for various hadron species at high $p_T$ in several collision systems including $U+U$ and $Cu+Au$. These proceedings will present the newest PHENIX $R_{AA}$ and two-particle correlation measurements and their role in our understanding of jet quenching and medium response in heavy ion collisions
