Collisional energy loss of a fast heavy quark in a quark-gluon plasma

Details Collisional energy loss of a fast heavy quark in a quark-gluon plasma Collisional energy loss of a fast heavy quark in a quark-gluon plasma

2008-02-29

arxiv.org/abs/0802.4364v1

Phys.Rev.D77:114017,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages

Scientific paper

10.1103/PhysRevD.77.114017

We discuss the average collisional energy loss dE/dx of a heavy quark crossing a quark-gluon plasma, in the limit of high quark energy E >> M^2/T, where M is the quark mass and T >> M is the plasma temperature. In the fixed coupling approximation, at leading order dE/dx \propto \alpha_s^2, with a coefficient which is logarithmically enhanced. The soft logarithm arising from t-channel scattering off thermal partons is well-known, but a collinear logarithm from u-channel exchange had previously been overlooked. We also determine the constant beyond those leading logarithms. We then generalize our calculation of dE/dx to the case of running coupling. We estimate the remaining theoretical uncertainty of dE/dx, which turns out to be quite large under RHIC conditions. Finally, we point out an approximate relation between dE/dx and the QCD Debye mass, from which we derive an upper bound to dE/dx for all quark energies.

Affiliated with

Also associated with

No associations

Rating

Collisional energy loss of a fast heavy quark in a quark-gluon plasma does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Collisional energy loss of a fast heavy quark in a quark-gluon plasma, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Collisional energy loss of a fast heavy quark in a quark-gluon plasma will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-352955