论文标题
在sqrt（s_nn）=恒星中的Au+au碰撞中的半出色喷射碎片函数的测量
Measurement of semi-inclusive jet fragmentation functions in Au+Au collisions at sqrt(s_NN) = 200 GeV in STAR
论文作者
论文摘要
相对论重离子碰撞中的喷射淬灭可能会带来多种现象学后果：喷气能量损失，喷气子结构的修饰和诱导的链球性。在这些程序中，我们报告了射流片段化函数的测量，这是JET子结构可观察的，在SQRT（S_NN）的外围Au+Au碰撞中，通过RHIC的Star实验在SQRT（S_NN）= 200 GEV中。特别是，我们使用了从高横向动量强力强子中后退的半含量喷气机。碎片函数是由投射到射流横向动量上的射流轴横向动量的分数构成的。在以前的半符合半熟悉的电荷射流光谱的明星出版物中，使用了混合事件技术，以及半包含的方法来删除不相关的背景贡献，这可以在重IION碰撞中测量低横向动量和大型喷射半径（R）的喷射分布。在此分析中，我们将这种方法扩展到了射流碎片函数的测量。通过展开，校正了报道的碎裂函数，以获得不相关的背景和仪器效应。将结果与毕曲霉模拟中的PP碰撞的结果进行了比较。
Jet quenching in relativistic heavy ion collisions can have multiple phenomenological consequences: jet energy loss, modification of jet substructure, and induced acoplanarity. In these proceedings, we report a measurement of the jet fragmentation function, which is one of the jet substructure observables, in peripheral Au+Au collisions at sqrt(s_NN) = 200 GeV by the STAR experiment at RHIC. In particular, we use a semi-inclusive population of jets recoiling from a high transverse momentum trigger hadron. The fragmentation function is constructed from the fraction of the transverse momentum of charged particles projected onto the jet axis over the transverse momentum of the jet. In a previous STAR publication of the semi-inclusive charged-jet spectra, the Mixed-Event technique was used along with the semi-inclusive approach to remove the uncorrelated background contributions, which enables the measurement of jet distributions at low transverse momentum and large jet radius (R) in heavy ion collisions. In this analysis we extend this approach to the measurement of jet fragmentation functions. The reported fragmentation functions are corrected for uncorrelated background and instrumental effects via unfolding. The results are compared to those in PYTHIA simulations for pp collisions.
