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Radiative and Collisional Jet Energy Loss in the Quark-Gluon Plasma at RHIC

Authors :
Qin, Guang-You
Ruppert, Jorg
Gale, Charles
Jeon, Sangyong
Moore, Guy D.
Mustafa, Munshi G.
Source :
Phys.Rev.Lett.100:072301,2008
Publication Year :
2007

Abstract

We calculate and compare bremsstrahlung and collisional energy loss of hard partons traversing a quark-gluon plasma. Our treatment of both processes is complete at leading order in the coupling and accounts for the probabilistic nature of the jet energy loss. We find that the nuclear modification factor $R_{AA}$ for neutral $\pi^0$ production in heavy ion collisions is sensitive to the inclusion of collisional and radiative energy loss contributions while the averaged energy loss only slightly increases if collisional energy loss is included for parent parton energies $E\gg T$. These results are important for the understanding of jet quenching in Au+Au collisions at $200 {\rm AGeV}$ at RHIC. Comparison with data is performed applying the energy loss calculation to a relativistic ideal (3+1)-dimensional hydrodynamic description of the thermalized medium formed at RHIC.<br />Comment: 4 pages, 3 figures

Details

Database :
arXiv
Journal :
Phys.Rev.Lett.100:072301,2008
Publication Type :
Report
Accession number :
edsarx.0710.0605
Document Type :
Working Paper
Full Text :
https://doi.org/10.1103/PhysRevLett.100.072301