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2008

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

Peigne, Stephane, Peshier, Andre

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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.

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

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