Radiative energy loss of high energy quarks in finite-size nuclear matter and quark-gluon plasma

Details Radiative energy loss of high energy quarks in finite-size nuclear matter and quark-gluon plasma Radiative energy loss of high energy quarks in finite-size nuclear matter and quark-gluon plasma

1997-04-07

arxiv.org/abs/hep-ph/9704255v1

JETP Lett.65:615-620,1997

Physics

High Energy Physics

High Energy Physics - Phenomenology

Plain LaTeX

Scientific paper

10.1134/1.567389

The induced gluon radiation of a high energy quark in a finite-size QCD medium is studied. For a sufficiently energetic quark produced inside a medium we find the radiative energy loss $\Delta E_{q}\propto L^{2}$, where L is the distance passed by quark in the medium. It has a weak dependence on the initial quark energy $E_{q}$. The $L^{2}$ dependence turns to $L^{1}$ as the quark energy decreases. Numerical calculations are performed for a cold nuclear matter and a hot quark-gluon plasma. For a quark incident on a nucleus we predict $\Delta E_{q}\approx 0.1 E_{q}(L/10 fm)^{\beta}$, with $\beta$ close to unity.

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