Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-06-05
Phys.Rev.C78:064906,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
13
Scientific paper
10.1103/PhysRevC.78.064906
The jet quenching parameter $\hat{q}$ is analyzed for a quark jet propagating in an anisotropic plasma. The momentum anisotropy is calculated at high temperature of the underlying quark-gluon plasma. $\hat{q}$ is explicitly estimated in leading-logarithmic approximation by the broadening of the massless quark interacting via gluon exchange. A plasma instability is present. Strong indications are found that $\hat{q}$ is increasing with increasing anisotropy. Possible implications for the saturation scale $Q_s$ in $A-A$ collisions are pointed out.
Baier Rolf
Mehtar-Tani Yacine
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