Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2010-12-13
Phys.Rev.C83:021901,2011
Physics
Nuclear Physics
Nuclear Theory
5 pages, 3 figures, the version to appear in Phys. Rev. C
Scientific paper
10.1103/PhysRevC.83.021901
The production length l_p of a leading (large z_h) hadron produced in hadronization of a highly virtual high-p_T parton is short because of the very intensive vacuum gluon radiation and dissipation of energy at the early stage of process. Therefore, the main part of nuclear suppression of high-p_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_T of the nuclear ratio R_{AA}(p_T), in good agreement with the recent data from the ALICE experiment at LHC, CERN. No adjustment, except the medium density is made, and the transport coefficient is found to be \hat q_0=0.8 GeV^2/fm. This is close to the value extracted from the analysis of 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 a status of a postdiction, the mechanism and all formulas have been published, and are applied here with no modification, except the kinematics. At the same time, p_T-dependence of R_{AA} at the energy of RHIC is rather flat due to the suppression factor steeply falling with rising x_T, related to the energy conservation constraints. This factor is irrelevant to the LHC data, since x_T is much smaller.
Kopeliovich Boris Z.
Potashnikova I. K.
Schmidt Ivan
No associations
LandOfFree
Color transparency and suppression of high-pT hadrons in nuclear collisions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Color transparency and suppression of high-pT hadrons in nuclear collisions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Color transparency and suppression of high-pT hadrons in nuclear collisions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-177760