Effects Of Initial State Fluctuations On Jet Quenching

In high-energy heavy-ion collisions, a lot of energy is deposited in a limited vol-ume, and produce a new form of matter-the quark-gluon plasma (QGP). The parton jet will loss energy when it propagating through the QGP medium, we call this phe-nomenon as jet quenching. In recent years, studies on the nature of the QGP medium show that its evolution more close to ideal fluid, in this study, we quantitatively re-search jet correction in QGP medium by calculating the single hadron suppression at RHIC. We descript the evolution of QGP by using2+1dimension ideal hydrody-namic model, and focus on the effects of initial state fluctuations on the jet energy loss.Quantum chromodynamics (QCD) is the basic theory used to describe the strong interaction between patrons, within the next-to-leading order perturbative QCD par-ton model and higher twist multiple scattering model, we calculate the production of a single hadron and nuclear modification factor RAA-We found that jet energy loss is proportional to the local medium density p(τ,t). Assuming jet energy loss depends on the local temperature of the medium,p(r, r)-T3, a jet loses less energy in the expanding quark-gluon plasma if the latter is described by the hydrodynamic evolution with initial conditions fluctuation. A detailed analysis indicates that this is mainly due to the negative correlation between the fluctuation in the production probability of the parton jets from initial nucleon-nucleon hard collisions and the fluctuation in the medium density along the path traversed by the jet.In our studies, parton jet energy loss ΔE can be introduced by medium modified fragmentation functions, nuclear modification factor RAA and energy loss difference between fluctuation and smooth initial conditions δ(ΔE) has been calculated to indi-cate the influence of the introduction of the initial state fluctuations. We also compare and analysis our results with results obtained in other models. In our model, we fur-ther analyzed the case to consider the QGP and hadron coexistence phase and local medium flow. The results show initial fluctuations will increase jet energy loss if we do not consider the coexistence phase, this is contrary to the case considering thecoexistence phase; and the effects of initial fluctuations will be strengthen if we donot consider the local medium flow.