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arxiv: 0810.5667 · v1 · submitted 2008-10-31 · ✦ hep-ph

QCD plasma equilibration, elliptic flow and jet-quenching - phenomena of common origin

classification ✦ hep-ph
keywords flowellipticjet-quenchingpqcdbampsbremsstrahlungbuildupcascade
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Fast thermalization, a subsequent strong buildup of elliptic flow of QCD matter and jet-quenching as found at the Relativistic Heavy Ion Collider (RHIC) are understood as the consequence of perturbative QCD (pQCD) interactions within the 3+1 dimensional parton cascade BAMPS. The main contributions stem from pQCD inspired bremsstrahlung. Comparisons to Au+Au data of the flow parameter v_2 as a function of participation number as well as the gluonic contribution to the nuclear modification factor R_AA for most central collisions are given. Also the shear viscosity to entropy ratio is dynamically extracted, which lies in the range of 0.08-0.15, depending on the chosen coupling constant.

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