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

Turbide, Simon; Gale, Charles; Moore, Guy D; Jeon, Sangyong

doi:10.1103/PhysRevC.72.014906

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

Full Record
Other Related Research

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.

Copy to clipboard


                    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

Copy to clipboard


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

Copy to clipboard


                    
@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}

}

Copy to clipboard

Journal Article:

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

Other availability

Find in Google Scholar

Search WorldCat to find libraries that may hold this journal

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

How do quarks and gluons lose energy in the QGP?

Journal Article Tannenbaum, M. - Journal of Physics. Conference Series

RHIC introduced the method of hard scattering of partons as an in-situ probe of the the medium produced in A+A collisions. A suppression, R_AA ≈ 0.2 relative to binary-scaling, was discovered for π⁰ production in the range 5 < ρ_T < 20 GeV/c in central Au+Au collisions at √s_NN = 200 GeV, and surprisingly also for single-electrons from the decay of heavy quarks. Both these results have been confirmed in Pb+Pb collisions at the LHC at √s_NN = 2.76 TeV. Interestingly, in this ρ_T range the LHC results for pions nearly overlap the RHIC results. Thus, due to the flattermore »« less
Cited by 1
https://doi.org/10.1088/1742-6596/589/1/012019

Full Text Available
Predictions for low-p{sub T} and high-p{sub T} hadron spectra in nearly central Pb+Pb collisions at {radical}(s{sub NN})=5.5 TeV tested at {radical}(s{sub NN})=130 and 200 GeV

Journal Article Eskola, K; Niemi, H; Ruuskanen, P; ... - Physical Review. C, Nuclear Physics

We study the hadron spectra in nearly central A+A collisions at the Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider (LHC) in a broad transverse momentum range. We cover the low-p{sub T} spectra using longitudinally boost-invariant hydrodynamics with initial energy and net-baryon number densities from the perturbative QCD (pQCD)+saturation model. Buildup of the transverse flow and sensitivity of the spectra to a single decoupling temperature T{sub dec} are studied. Comparison with RHIC data at {radical}(s{sub NN})=130 and 200 GeV suggests a rather high value T{sub dec}=150 MeV. The high-p{sub T} spectra are computed using factorized pQCD cross sections,more »« less
https://doi.org/10.1103/PhysRevC.72.044904
Systematic study of high p{sub T} hadron spectra in pp, pA, and AA collisions at ultrarelativistic energies

Journal Article Wang, Xin-Nian - Physical Review. C, Nuclear Physics

High-p{sub T} particle spectra in p+p (p(bar sign)+p), p+A, and A+B collisions are calculated in a parton model with QCD-inspired hard scattering and evolution in which intrinsic transverse momentum, its broadening due to initial multiple parton scattering, and jet quenching due to parton energy loss inside a dense medium are included phenomenologically. The intrinsic k{sub T} and its broadening in p+A and A+B collisions due to initial multiple parton scattering are found to be very important at low energies ({radical}(s)<50 GeV). Comparisons with S+S, S+Au, and Pb+Pb data with different centrality cuts show that the differential cross sections of largemore »« less
https://doi.org/10.1103/PhysRevC.61.064910
Identified particle production, azimuthal anisotropy, and interferometry measurements in Au+Au collisions at sqrt sNN = 9.2 GeV

Journal Article Abelev, Betty - Physical Review C

We present the first measurements of identified hadron production, azimuthal anisotropy, and pion interferometry from Au+Au collisions below the nominal injection energy at the Relativistic Heavy-Ion Collider (RHIC) facility. The data were collected using the large acceptance STAR detector at {radical}s{sub NN} = 9.2 GeV from a test run of the collider in the year 2008. Midrapidity results on multiplicity density (dN/dy) in rapidity (y), average transverse momentum (<p{sub T}>), particle ratios, elliptic flow, and HBT radii are consistent with the corresponding results at similar {radical}s{sub NN} from fixed target experiments. Directed flow measurements are presented for both midrapidity andmore »« less
Full Text Available
Measurements of {phi} meson production in relativistic heavy-ion collisions at the BNL Relativistic Heavy Ion Collider (RHIC)

Journal Article Abelev, B; Barannikova, O; Betts, R; ... - Physical Review. C, Nuclear Physics

We present results for the measurement of {phi} meson production via its charged kaon decay channel {phi}{yields}K{sup +}K{sup -} in Au+Au collisions at {radical}(s{sub NN})=62.4,130, and 200 GeV, and in p+p and d+Au collisions at {radical}(s{sub NN})=200 GeV from the STAR experiment at the BNL Relativistic Heavy Ion Collider (RHIC). The midrapidity (|y|<0.5) {phi} meson transverse momentum (p{sub T}) spectra in central Au+Au collisions are found to be well described by a single exponential distribution. On the other hand, the p{sub T} spectra from p+p, d+Au, and peripheral Au+Au collisions show power-law tails at intermediate and high p{sub T} andmore »« less
https://doi.org/10.1103/PHYSREVC.79.064903

Similar Records