Energy loss of leading hadrons and direct photon production in evolving quark-gluon plasma

doi:https://doi.org/10.1103/PhysRevC.72.014906

Title: Energy loss of leading hadrons and direct photon production in evolving quark-gluon plasma

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Abstract

We calculate the nuclear modification factor of neutral pions and the photon yield at high p{sub T} in central Au-Au collisions at the Relativistic Heavy-Ion Collider (RHIC) ({radical}(s)=200 GeV) and Pb-Pb collisions at the Large Hadron Collider (LHC) ({radical}(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 one dimensional hydrodynamic expansion. We reproduce the nuclear modification factor for pions R{sub AA} at RHIC, assuming an initial temperature T{sub i}=370 MeV and a formation time {tau}{sub 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{sub T} photons. Photons coming from primordial hard N-N scattering are the dominant contribution at RHIC for p{sub T}>5 GeV, whereas at the LHC, the range 8<p{sub T}<14 GeV is dominated by jet-photon conversion in the plasma.

Authors:

Turbide, Simon; Gale, Charles; Moore, Guy D ^[1]; Jeon, Sangyong ^[1]

Department of Physics, McGill Univer-sity, 3600 University Street, Montreal, H3A 2T8 (Canada)

Publication Date:: 2005-07-01

OSTI Identifier:: 20698849

Resource Type:: Journal Article

Journal Name:: Physical Review. C, Nuclear Physics

Additional Journal Information:: Journal Volume: 72; Journal Issue: 1; Other Information: DOI: 10.1103/PhysRevC.72.014906; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2813

Country of Publication:: United States

Language:: English

Subject:: 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; BROOKHAVEN RHIC; CERN LHC; ENERGY LOSSES; GEV RANGE; GLUONS; GOLD 197 REACTIONS; GOLD 197 TARGET; JET MODEL; MEV RANGE; NUCLEAR REACTION YIELD; PARTICLE PRODUCTION; PARTICLE RAPIDITY; PHOTONS; PIONS NEUTRAL; QUANTUM CHROMODYNAMICS; QUARK MATTER; SPATIAL DISTRIBUTION

Citation Formats


                    Turbide, Simon, Gale, Charles, Moore, Guy D, Jeon, Sangyong, and RIKEN-BNL Research Center, Upton, New York 11973-5000. Energy loss of leading hadrons and direct photon production in evolving quark-gluon plasma.  United States: N. p., 2005. 
        Web.  doi:10.1103/PhysRevC.72.014906.

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                    Turbide, Simon, Gale, Charles, Moore, Guy D, Jeon, Sangyong, & RIKEN-BNL Research Center, Upton, New York 11973-5000. Energy loss of leading hadrons and direct photon production in evolving quark-gluon plasma.  United States.  https://doi.org/10.1103/PhysRevC.72.014906

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                    Turbide, Simon, Gale, Charles, Moore, Guy D, Jeon, Sangyong, and RIKEN-BNL Research Center, Upton, New York 11973-5000. Fri .  
        "Energy loss of leading hadrons and direct photon production in evolving quark-gluon plasma".  United States.  https://doi.org/10.1103/PhysRevC.72.014906.

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@article{osti_20698849,

  title        = {Energy loss of leading hadrons and direct photon production in evolving quark-gluon plasma},

  author       = {Turbide, Simon and Gale, Charles and Moore, Guy D and Jeon, Sangyong and RIKEN-BNL Research Center, Upton, New York 11973-5000},

  abstractNote = {We calculate the nuclear modification factor of neutral pions and the photon yield at high p{sub T} in central Au-Au collisions at the Relativistic Heavy-Ion Collider (RHIC) ({radical}(s)=200 GeV) and Pb-Pb collisions at the Large Hadron Collider (LHC) ({radical}(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 one dimensional hydrodynamic expansion. We reproduce the nuclear modification factor for pions R{sub AA} at RHIC, assuming an initial temperature T{sub i}=370 MeV and a formation time {tau}{sub 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{sub T} photons. Photons coming from primordial hard N-N scattering are the dominant contribution at RHIC for p{sub T}>5 GeV, whereas at the LHC, the range 8<p{sub T}<14 GeV is dominated by jet-photon conversion in the plasma.},

  doi          = {10.1103/PhysRevC.72.014906},

  url          = {https://www.osti.gov/biblio/20698849},
  journal      = {Physical Review. C, Nuclear Physics},

  issn         = {0556-2813},

  number       = 1,

  volume       = 72,

  place        = {United States},

  year         = {2005},

  month        = {7}

}

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