349 research outputs found
Bremsstrahlung photon from a hadronizing quark-gluon plasma
Assuming that quark and antiquark numbers are separately conserved during
hadronization, we calculate Bremsstrahlung photon from a hadronizing
quark-gluon plasma. The quark and antiquark numbers are obtained from the
hadron numbers in the statistical model and the transition amplitudes for the
hadronization from the constraint that all quarks and antiquarks must be
consumed in the hadronization. We find that the Bremsstrahlung photon from
hadronization is not significant but its contribution to the direct photon
increases in low-energy heavy-ion collisions and in peripheral collisions where
the lifetime of a quark-gluon plasma (QGP) is relatively short.Comment: 5 pages, 5 figure
Hot medium effects on J/psi production in p+Pb collisions at sqrt{s_{NN}}=5.02 TeV
Based on a kinetic description of J/psi dissociation and production in an
expanding quark-gluon plasma that is described by a 2+1 dimensional ideal
hydrodynamics, we have studied the hot medium effects on J/psi production in
p+Pb collisions at sqrt{s_{NN}}=5.02 TeV. Including also the cold nuclear
matter effects, we are able to reproduce recent experimental results on the
nuclear modification factor R_{pPb}(J/psi) measured by the ALICE Collaboration.
We have also made predictions for the R_{pPb} of J/psi and the double ratio
R_{pPb}^{pro}(psi')/R_{pPb}^{pro}(J/psi) of prompt quarkonia produced in the
most central 10% p+Pb collisions. We find that different from the cold nuclear
matter effects, the R_{pPb}(J/psi) is slightly smaller than that in the minimum
bias collisions, and the double ratio is significantly less than one at
backward rapidity.Comment: 8 pages, 6 figure
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