Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-02-24
Phys.Rev. D71 (2005) 073006
Physics
High Energy Physics
High Energy Physics - Phenomenology
Revtex 20 pages
Scientific paper
10.1103/PhysRevD.71.073006
We study the electromagnetic properties of a system that consists of an electron background and a neutrino gas that may be moving or at rest, as a whole, relative to the background. The photon self-energy for this system is characterized by the usual transverse and longitudinal polarization functions, and two additional ones which are the focus of our calculations, that give rise to birefringence and anisotropic effects in the photon dispersion relations. Expressions for them are obtained, which depend on the neutrino number densities and involve momentum integrals over the electron distribution functions, and are valid for any value of the photon momentum and general conditions of the electron gas. Those expressions are evaluated explicitly for several special cases and approximations which are generally useful in astrophysical and cosmological settings. Besides studying the photon dispersion relations, we consider the macroscopic electrodynamic equations for this system, which involve the standard dielectric and permeability constants plus two additional ones related to the photon self-energy functions. As an illustration, the equations are used to discuss the evolution of a magnetic field perturbation in such a medium. This particular phenomena has also been considered in a recent work by Semikoz and Sokoloff as a mechanism for the generation of large-scale magnetic fields in the Early Universe as a consequence of the neutrino-plasma interactions, and allows us to establish contact with a specific application in a well defined context, with a broader scope and from a very different point of view.
Nieves Jos'e F.
Sahu Sarira
No associations
LandOfFree
Electromagnetic effects of neutrinos in an electron gas does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Electromagnetic effects of neutrinos in an electron gas, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electromagnetic effects of neutrinos in an electron gas will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-235459