Momentum broadening of a fast parton in a perturbative quark-gluon plasma
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The average transverse momentum transfer per unit path length to a fast parton scattering elastically in a perturbative quark-gluon plasma is related to the radiative energy loss of the parton. We first calculate the momentum transfer coefficient q^ in terms of a classical Langevin problem and then define it quantum mechanically through a scattering matrix element. After treating the well-known case of a quark-gluon plasma in equilibrium, we consider an off-equilibrium unstable plasma. As a specific example, we treat the two-stream plasma with unstable modes of longitudinal chromoelectric field. In the presence of the instabilities, q^ is shown to exponentially grow in time. © 2009 The American Physical Society.
Published Version (Please cite this version)10.1103/PhysRevD.80.125020
Publication InfoMajumder, A; Müller, B; & Mrówczyński, S (2009). Momentum broadening of a fast parton in a perturbative quark-gluon plasma. Physical Review D - Particles, Fields, Gravitation and Cosmology, 80(12). pp. 125020. 10.1103/PhysRevD.80.125020. Retrieved from https://hdl.handle.net/10161/4270.
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