Vacuum Cerenkov Radiation in Lorentz-Violating Theories Without CPT Violation
Brett Altschul
TL;DR
This paper investigates vacuum Cerenkov radiation in Lorentz-violating theories without CPT violation, analyzing emission thresholds, spectra, and Mach cone shapes to understand potential observable effects of Lorentz symmetry breaking.
Contribution
It provides the first detailed analysis of vacuum Cerenkov radiation in Lorentz-violating photon theories without CPT violation, including threshold and spectral calculations.
Findings
Identified conditions under which vacuum Cerenkov radiation occurs
Calculated the emission threshold energies and spectral characteristics
Determined the shape of the Mach cone associated with the radiation
Abstract
In theories with broken Lorentz symmetry, Cerenkov radiation may be possible even in vacuum. We analyze the Cerenkov emissions that are associated with the least constrained Lorentz-violating modifications of the photon sector, calculating the threshold energy, the frequency spectrum, and the shape of the Mach cone. In order to obtain sensible results for the total power emitted, we must make use of information contained within the theory which indicates at what scale new physics must enter.
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