Finite duration and energy effects in Lorentzviolating vacuum Cerenkov radiation
Abstract
Vacuum Cerenkov radiation is possible in certain Lorentzviolating quantum field theories, when very energetic charges move faster than the phase speed of light. In the presence of a CPTeven, Lorentzviolating modification of the photon sector, the character of the Cerenkov process is controlled by the highfrequency behavior of the radiation spectrum. The development of the Cerenkov process can be markedly different, depending on whether the only limits on the emission of very energetic photons come from energymomentum conservation or whether there are additional effects that cut off the spectrum at high frequencies. Moreover, since the highfrequency cutoff determines the total rate at which an emitting charge loses energy, it also controls all aspects of the emission that are related to the process's finite duration.
 Publication:

Nuclear Physics B
 Pub Date:
 June 2008
 DOI:
 10.1016/j.nuclphysb.2007.12.012
 arXiv:
 arXiv:0709.4478
 Bibcode:
 2008NuPhB.796..262A
 Keywords:

 11.30.Cp;
 11.30.Er;
 41.20.Jb;
 41.60.Bq;
 Lorentz and Poincare invariance;
 Charge conjugation parity time reversal and other discrete symmetries;
 Electromagnetic wave propagation;
 radiowave propagation;
 Cherenkov radiation;
 High Energy Physics  Theory
 EPrint:
 15 pages