Schematic representation of jet quenching and the asymmetry of jet energy loss. (IMAGE)
Caption
The suppression and azimuthal anisotropy of the high transverse momentum (pT) hadrons are both consequences of jet quenching or energy loss. The suppression strength is given by the nuclear modification factor RAA(pT) defined as the ratio of single hadron production yield in A + A collisions to that in p + p collisions scaled by the average nuclear overlap function. Azimuthal anisotropy of large-pT hadrons owing to the path length and gluon density dependence of the jet energy loss, is characterized by elliptic flow coefficient v2(pT). Within a next-to-leading-order perturbative QCD model, the medium-temperature dependence of jet energy loss was investigated by comparing theoretical calculations with experimental data for both RAA and v2 at large pT at RHIC and LHC.
Credit
Han-Zhong Zhang
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License
CC BY-NC