Momentum broadening of a fast parton in a perturbative quark-gluon plasma


Journal Article

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.

Full Text

Duke Authors

Cited Authors

  • Majumder, A; Müller, B; MrówczyƄski, S

Published Date

  • December 17, 2009

Published In

Volume / Issue

  • 80 / 12

Electronic International Standard Serial Number (EISSN)

  • 1550-2368

International Standard Serial Number (ISSN)

  • 1550-7998

Digital Object Identifier (DOI)

  • 10.1103/PhysRevD.80.125020

Citation Source

  • Scopus