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Title: Color transparency and suppression of high-p{sub T} hadrons in nuclear collisions

Abstract

The production length l{sub p} of a leading (large z{sub h}) hadron produced in hadronization of a highly virtual high-p{sub T} parton is short because of the very intensive vacuum gluon radiation and dissipation of energy at the early stage of the process. Therefore, the main part of nuclear suppression of high-p{sub T} hadrons produced in heavy ion collisions is related to the survival probability of a colorless dipole propagating through a dense medium. This is subject to color transparency, which leads to a steep rise with p{sub T} of the nuclear ratio R{sub AA}(p{sub T}), in good agreement with the recent data from the ALICE experiment at the CERN Large Hadron Collider (LHC). No adjustment, except for the medium density, is made, and the transport coefficient is found to be q{sub 0}=0.8 GeV{sup 2}/fm. This is close to the value extracted from the analysis of BNL Relativistic Heavy Ion Collider (RHIC) data for J/{Psi} suppression, but is an order of magnitude smaller than the value found from jet quenching data within the energy loss scenario. Although the present calculations have the status of a postdiction, the mechanism and all formulas have been published, and are applied here with nomore » modification, except for the kinematics. At the same time, p{sub T} dependence of R{sub AA} at the energy of RHIC is rather flat due to the suppression factor steeply falling with rising x{sub T}, related to the energy conservation constraints. This factor is irrelevant to the LHC data, since x{sub T} is much smaller.« less

Authors:
; ;  [1]
  1. Departamento de Fisica, Universidad Tecnica Federico Santa Maria, Valparaiso, Chile, Instituto de Estudios Avanzados en Ciencias e Ingenieria, Valparaiso, Chile, and Centro Cientifico-Tecnologico de Valparaiso, Casilla 110-V, Valparaiso (Chile)
Publication Date:
OSTI Identifier:
21499394
Resource Type:
Journal Article
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 83; Journal Issue: 2; Other Information: DOI: 10.1103/PhysRevC.83.021901; (c) 2011 American Institute of Physics; Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ALICE; BNL; BROOKHAVEN RHIC; CERN LHC; COLOR MODEL; DIPOLES; ENERGY CONSERVATION; ENERGY LOSSES; GLUONS; HEAVY ION REACTIONS; J PSI-3097 MESONS; PARTICLE PRODUCTION; PROBABILITY; QUENCHING; ACCELERATORS; BOSONS; CHARMONIUM; COMPOSITE MODELS; CYCLIC ACCELERATORS; ELEMENTARY PARTICLES; HADRONS; HEAVY ION ACCELERATORS; LOSSES; MAGNETIC MIRRORS; MATHEMATICAL MODELS; MESONS; MULTIPOLES; NATIONAL ORGANIZATIONS; NUCLEAR REACTIONS; OPEN PLASMA DEVICES; PARTICLE MODELS; QUARK MODEL; QUARKONIUM; STORAGE RINGS; SYNCHROTRONS; THERMONUCLEAR DEVICES; US AEC; US DOE; US ERDA; US ORGANIZATIONS; VECTOR MESONS

Citation Formats

Kopeliovich, B Z, Potashnikova, I K, and Schmidt, Ivan. Color transparency and suppression of high-p{sub T} hadrons in nuclear collisions. United States: N. p., 2011. Web. doi:10.1103/PHYSREVC.83.021901.
Kopeliovich, B Z, Potashnikova, I K, & Schmidt, Ivan. Color transparency and suppression of high-p{sub T} hadrons in nuclear collisions. United States. https://doi.org/10.1103/PHYSREVC.83.021901
Kopeliovich, B Z, Potashnikova, I K, and Schmidt, Ivan. Tue . "Color transparency and suppression of high-p{sub T} hadrons in nuclear collisions". United States. https://doi.org/10.1103/PHYSREVC.83.021901.
@article{osti_21499394,
title = {Color transparency and suppression of high-p{sub T} hadrons in nuclear collisions},
author = {Kopeliovich, B Z and Potashnikova, I K and Schmidt, Ivan},
abstractNote = {The production length l{sub p} of a leading (large z{sub h}) hadron produced in hadronization of a highly virtual high-p{sub T} parton is short because of the very intensive vacuum gluon radiation and dissipation of energy at the early stage of the process. Therefore, the main part of nuclear suppression of high-p{sub T} hadrons produced in heavy ion collisions is related to the survival probability of a colorless dipole propagating through a dense medium. This is subject to color transparency, which leads to a steep rise with p{sub T} of the nuclear ratio R{sub AA}(p{sub T}), in good agreement with the recent data from the ALICE experiment at the CERN Large Hadron Collider (LHC). No adjustment, except for the medium density, is made, and the transport coefficient is found to be q{sub 0}=0.8 GeV{sup 2}/fm. This is close to the value extracted from the analysis of BNL Relativistic Heavy Ion Collider (RHIC) data for J/{Psi} suppression, but is an order of magnitude smaller than the value found from jet quenching data within the energy loss scenario. Although the present calculations have the status of a postdiction, the mechanism and all formulas have been published, and are applied here with no modification, except for the kinematics. At the same time, p{sub T} dependence of R{sub AA} at the energy of RHIC is rather flat due to the suppression factor steeply falling with rising x{sub T}, related to the energy conservation constraints. This factor is irrelevant to the LHC data, since x{sub T} is much smaller.},
doi = {10.1103/PHYSREVC.83.021901},
url = {https://www.osti.gov/biblio/21499394}, journal = {Physical Review. C, Nuclear Physics},
issn = {0556-2813},
number = 2,
volume = 83,
place = {United States},
year = {2011},
month = {2}
}