Momentum Broadening in an Anisotropic Plasma

Details Momentum Broadening in an Anisotropic Plasma Momentum Broadening in an Anisotropic Plasma

2006-07-29

arxiv.org/abs/hep-ph/0607327v2

Phys.Rev.C75:014901,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, 2 figures, uses revtex4; see source for numerics; v2: typos corrected, note added in appendix, matches published ver

Scientific paper

10.1103/PhysRevC.75.014901

The rates governing momentum broadening in a quark-gluon plasma with a momentum anisotropy are calculated to leading-log order for a heavy quark using kinetic theory. It is shown how the problematic singularity for these rates at leading-oder is lifted by next-to-leading order gluon self-energy corrections to give a finite contribution to the leading-log result. The resulting rates are shown to lead to larger momentum broadening along the beam axis than in the transverse plane, which is consistent with recent STAR results. This might indicate that the quark-gluon-plasma at RHIC is not in equilibrium.

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