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

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