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Energy Loss of Leading Hadrons and Direct Photon production in Evolving Quark-Gluon Plasma

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arxiv hep-ph/0502248 v3 pith:ITU7PCH5 submitted 2005-02-28 hep-ph nucl-th

Simon Turbide (McGill University) , Charles Gale (McGill University) , Sangyong Jeon (McGill University , RIKEN-BNL Research Center) , Guy D. Moore (McGill University) This is my paper
classification hep-phnucl-th
keywords energyinitiallossrhiccollisionsfactorhighmodification
verification ladder T0 review T1 audit T2 compute T3 formal
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We calculate the nuclear modification factor of neutral pions and the photon yield at high p_T in central Au-Au collisions at RHIC (\sqrt{s}=200 GeV) and Pb-Pb collisions at the LHC (\sqrt{s}=5500 GeV). A leading-order accurate treatment of jet energy loss in the medium has been convolved with a physical description of the initial spatial distribution of jets and a (1+1) dimensional expansion. We reproduce the nuclear modification factor of pion R_{AA} at RHIC, assuming an initial temperature T_i=370 MeV and a formation time \tau_i=0.26 fm/c, corresponding to dN/dy=1260. The resulting suppression depends on the particle rapidity density dN/dy but weakly on the initial temperature. The jet energy loss treatment is also included in the calculation of high p_T photons. Photons coming from primordial hard N-N scattering are the dominant contribution at RHIC for p_T > 5 GeV, while at the LHC, the range 8<p_T<14 GeV is dominated by jet-photon conversion in the plasma.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Probing Pair Correlations in QCD Matter with Photon Spectra

    hep-ph 2026-06 unverdicted novelty 5.0 of 10

    Relative-angle modes of pair correlations produce sign-changing modifications to the in-medium photon spectrum with magnitudes comparable to the factorized contribution.

  2. Coherent State Path Integral Reveals Unexpected Vacuum Structure in Thermal Field Theory

    hep-th 2025-07 reject novelty 3.0 of 10

    A coherent-state derivation of the thermal partition function yields extra vacuum and mass-coupling terms that the authors claim are novel, though these terms reflect the chosen operator ordering.

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