Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2011-05-12
AIP Conf.Proc.1348:86-94,2011
Physics
Nuclear Physics
Nuclear Theory
Prepared for the 5th International Workshop on High-pT Physics at LHC, ICN-UNAM, 27 Sep.-1 Oct, 2010
Scientific paper
10.1063/1.3579435
In high energy heavy ion collisions at RHIC there are important aspects of the medium induced dynamics, that are still not well understood. In particular, there is a broadening and even a double hump structure of the away-side peak appearing in azimuthal correlation studies in Au+Au collisions which is absent in p+p collisions at the same energies. These features are already present but suppressed in p+p collisions: 2 to 3 parton processes produce such structures but are suppressed with respect to 2 to 2 processes. We argue that in A+A collisions the different geometry for the trajectories of 3 as opposed to 2 particles in the final state, together with the medium induced energy loss effects on the different cross sections, create a scenario that enhances processes with 3 particles in the final state, which gives on average this double hump structure.
Ayala Alejandro
Jalilian--Marian Jamal
Magnin Javier
Ortiz Antonio
Paic Guy
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