2009/07/31 by Carlos Hoyos, Carlos Hoyos-Badajoz
Physics and Astronomy 路 #High-Energy Particle Collisions Research #Pulsars and Gravitational Waves Research #Quantum Chromodynamics and Particle Interactions #hep-th
paper 路 pdf 路 doi:10.1088/1126-6708/2009/09/068
published as JHEP 0909:068,2009 路 30 pages, 5 figures, references added, minor corrections. To be published in JHEP
arxiv created 2009/09/14 路 openalex publication_date 2009/09/14 路 arxiv updated 2009/12/01 路 openalex created_date 2016/06/24 路 openalex updated_date 2026/07/29
The drag of a heavy quark and the jet quenching parameter are studied in the strongly coupled N=2* plasma using the AdS/CFT correspondence. Both increase in units of the spatial string tension as the theory departs from conformal invariance. The description of heavy quark dynamics using a Langevin equation is also considered. It is found that the difference between the velocity dependent factors of the transverse and longitudinal momentum broadening of the quark admit an interpretation in terms of relativistic effects, so the distribution is spherical in the quark rest frame. When conformal invariance is broken there is a broadening of the longitudinal momentum distribution. This effect may be useful in understanding the jet distribution observed in experiments.