Vacuum Cherenkov radiation in spacelike MaxwellChernSimons theory
Abstract
A detailed analysis of vacuum Cherenkov radiation in spacelike MaxwellChernSimons (MCS) theory is presented. A semiclassical treatment reproduces the leading terms of the treelevel result from quantum field theory. Moreover, certain quantum corrections turn out to be suppressed for large energies of the charged particle, for example, the quantum corrections to the classical MCS Cherenkov angle. It is argued that MCStheory Cherenkov radiation may, in principle, lead to anisotropy effects for ultrahighenergy cosmic rays (UHECRs). In addition, a qualitative discussion of vacuum Cherenkov radiation from a modifiedMaxwell term in the action is given, together with UHECR bounds on some of its dimensionless “coupling constants.”
 Publication:

Physical Review D
 Pub Date:
 July 2007
 DOI:
 10.1103/PhysRevD.76.025024
 arXiv:
 arXiv:0704.3255
 Bibcode:
 2007PhRvD..76b5024K
 Keywords:

 11.30.Cp;
 12.20.m;
 41.60.Bq;
 98.70.Sa;
 Lorentz and Poincare invariance;
 Quantum electrodynamics;
 Cherenkov radiation;
 Cosmic rays;
 High Energy Physics  Theory;
 Astrophysics;
 High Energy Physics  Phenomenology
 EPrint:
 24 pages with revtex4, v5: published version