Jet modification in three dimensional fluid dynamics at next-to-leading twist

作     者：A. Majumder C. Nonaka S. A. Bass 

作者机构：Department of Physics Duke University Durham North Carolina 27708 USA Department of Physics Nagoya University Nagoya 464-8602 Japan 

出 版 物：《Physical Review C》 (物理学评论C辑：核物理学)

年 卷 期：2007年第76卷第4期

页      面：041902(R)-041902(R)页

核心收录：

学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

主　　题：NUCLEUS-NUCLEUS COLLISIONS HEAVY-ION COLLISIONS QUARK-GLUON PLASMA PARTON ENERGY-LOSS FRAGMENTATION FUNCTIONS HADRON SPECTRA COLLABORATION FLUCTUATIONS PERSPECTIVE TOMOGRAPHY 

摘      要：The modification of the single inclusive spectrum of high transverse momentum (pT) pions emanating from an ultrarelativistic heavy-ion collision is investigated. The deconfined sector is modeled using a full three-dimensional (3-D) ideal fluid dynamics simulation. Energy loss of high pT partons and the ensuing modification of their fragmentation is calculated within perturbative QCD at next-to-leading twist, where the magnitude of the higher twist contribution is modulated by the entropy density extracted from the 3-D fluid dynamics simulation. The nuclear modification factor (RAA) for pions with a pT⩾8 GeV as a function of centrality as well as with respect to the reaction plane is calculated. The magnitude of contributions to the differential RAA within small angular ranges, from various depths in the dense matter, is extracted from the calculation and demonstrates the correlation of the length integrated density and the RAA from a given depth. The significance of the mixed and hadronic phase to the overall magnitude of energy loss is explored.