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

The modification of the single inclusive spectrum of high transverse momentum (p(T)) 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 p(T) 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 (R-AA) for pions with a p(T)>= 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 R-AA 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 R-AA from a given depth. The significance of the mixed and hadronic phase to the overall magnitude of energy loss is explored.