Extraction of dihadron-jet correlations with rigorous flow-background subtraction in a multiphase transport model

Dihadron azimuthal correlations in Au+Au collisions at root S-NN = 200 GeV are explored by using a multiphase transport model. To obtain the contributions from jet-medium interactions, the combined harmonic flow background is subtracted from the raw dihadron correlation functions. The signals are compared in three associated transverse momentum (p(T)(assoc)) bins: 0.2-0.8, 0.8-1.4, and 1.4-2.0 GeV/c from central to semiperipheral geometries. The medium modifications are observed from changes in the signal shape and the relative jet contribution is obtained within the change in the centrality from the peripheral to the central one. A strong p(T)(assoc) dependence of the rms width of the jet-correlation function is observed within the central geometry bin, i.e., 0-10%. DOI: 10.1103/PhysRevC.87.024904