Can we see from jet quenching that quark-gluon plasma becomes more perturbative at LHC than at RHIC

May 27, 2011, 6:50 PM
Salon Verdi AB (Imperial Palace)

Salon Verdi AB

Imperial Palace

Allée Impérial 74000 Annecy, France Tél. : +33 4 50 09 30 00 Salle de l'Europe, Imperial Palace
Parallel Jets Jets


Bronislav Zakharov (Landau Institute)


We study the nuclear modification factor R_AA at RHIC and LHC energies. We account for the radiative and collisional energy losses. Both the contributions are calculated with running \alpha_s accounting for fluctuations of the jet path lengths. The effect of the thermal suppression of \alpha_s is investigated. Comparison of the theoretical results with the experimental data obtained at RHIC and in the ALICE experiment at LHC demonstrates that the experimental R_AA may be described in pQCD with the entropy extracted from the multiplicity data. However for LHC the thermal suppression of \alpha_s should be stronger. This fact demonstrates that at LHC the quark-gluon plasma becomes more perturbative.

Primary author

Bronislav Zakharov (Landau Institute)

Presentation materials