Parton energy loss at strong coupling and the universal bound

Abstract

The apparent universality of jet quenching observed in heavy ion collisions at RHIC for light and heavy quarks, as well as for quarks and gluons, is very puzzling and calls for a theoretical explanation. Recently it has been proposed that the synchrotron--like radiation at strong coupling gives rise to a universal bound on the energy of a parton escaping from the medium. Since this bound appears quite low, almost all of the observed particles at high transverse momentum have to originate from the surface of the hot fireball. Here I make a first attempt of checking this scenario against the RHIC data and formulate a "Universal Bound Model" of jet quenching that can be further tested at RHIC and LHC.

8 pages, 2 figures, invited plenary talk given at "Hard Probes 2008" Conference, 8-14 June 2008, Illa da Toxa, Galicia, Spain

References in corpus (13)

• Viscosity in Strongly Interacting Quantum Field Theories from Black Hole Physics
• Charge separation induced by P-odd bubbles in QCD matter
• A calculation of the bulk viscosity in SU(3) gluodynamics
• Thermodynamics and bulk viscosity of approximate black hole duals to finite temperature quantum chromodynamics
• Bulk viscosity of gauge theory plasma at strong coupling
• Comparing energy loss and $p_{\perp }$-broadening in perturbative QCD with strong coupling $\mathcal{N}=4$ SYM theory
• Expanding color flux tubes and instabilities
• Nonlinear waves in AdS/CFT correspondence
• Implications of CP-violating transitions in hot quark matter on heavy ion collisions
• Thermalization of Color Gauge Fields in High Energy Heavy Ion Collisions
• Highlights from PHENIX - II
• Heavy Quark Measurements by Single Electrons in the PHENIX Experiment
• Anisotropic flow: Achievements, Difficulties, Expectations