16,439 research outputs found
Towards detailed tomography of high energy heavy-ion collisions by -jet
Within a multi-phase transport (AMPT) model with string melting scenario, the
transverse momentum imbalance between prompt photon and jet is studied in Pb+Pb
collisions at = 2.76 TeV. Jet loses more energy in more
central collisions due to strong partonic interactions between jet parton
shower and partonic matter, which is more significant than due to hadronic
interactions only. The hadronization and final-state hadronic interactions have
little influences on the imbalance. The imbalance ratio is
sensitive to both production position and passing direction of -jet,
which provides an opportunity to do detail -jet tomography on the
formed partonic matter by selecting different ranges. It is also
proposed that -hadron azimuthal correlation associated with photon+jet
is a probe to see the medium responses to different -jet production
configurations.Comment: 5 pages, 4 figures, final published versio
Final state effects on charge asymmetry of pion elliptic flow in high-energy heavy-ion collisions
Within a multi-phase transport (AMPT) model with the string melting mechanism
and imported initial electric quadrupole moment, the difference between the
elliptic flow of positive and negative pions is calculated. The slope parameter
of the linear dependence of on
is yielded owing to the parton cascade,
which converts the initial electric quadrupole distribution into the final
charge-dependent elliptic flow. The slope parameter is found to be
increased by the hadronization given by the coalescence, and decreased by the
resonance decays. The slope parameter is very sensitive to both the initial
electric quadrupole percentage and centrality bin and consequently a helpful
constraint on the quadrupole moment of the chiral magnetic wave is obtained for
Au+Au collisions at the top RHIC energy.Comment: 4 pages, 4 figures, 1 table, final published versio
Long-range azimuthal correlations in proton-proton and proton-nucleus collisions from the incoherent scattering of partons
We show that the incoherent elastic scattering of partons, as present in a
multi-phase transport model (AMPT), with a modest parton-parton cross-section
of mb, naturally explains the long-range two-particle
azimuthal correlation as observed in proton-proton and proton-nucleus
collisions at the Large Hadron Collider.Comment: 7 pages, 6 figures; 2 new figures added, final published versio
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