Damping rates of hard momentum particles in a cold ultrarelativistic plasma

[en] We compute the damping rates of one-particle excitations in a cold ultrarelativistic plasma to leading order in the coupling constant e for three types of interaction: Yukawa coupling to a massless scalar boson, QED, and QCD. Damping rates of charged particles in QED and QCD are of order e(3) mu, while the damping rates of other particles are of order e(4) mu or e(4) mu log(1/e). We find that the damping rate of an electron or of a quark is constant far from the Fermi surface, and decreases linearly with the excitation energy close to the Fermi surface. This unusual behavior is attributed to the long-range magnetic interactions.

Disciplines :

Physics

Author, co-author :

Vanderheyden, Benoît ; University of Illinois at Urbana Champaign > Dept. of Physics

Ollitrault, J. Y.; CE-Saclay, Gif-sur-Yvette > Service de physique théorique

Language :

English

Title :

Damping rates of hard momentum particles in a cold ultrarelativistic plasma

Publication date :

1997

Journal title :

Physical Review. D, Particles and Fields

ISSN :

0556-2821

eISSN :

1089-4918

Publisher :

American Physical Society, College Park, United States - Maryland

Volume :

Issue :

Pages :

5108-5122

Peer reviewed :

Peer reviewed

Additional URL :

http://link.aps.org/doi/10.1103/PhysRevD.56.5108
http://arxiv.org/abs/hep-ph/9611415

Available on ORBi :

since 12 August 2009

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