Modified energy-momentum conservation laws and vacuum Cherenkov radiation
Abstract
We present a general parametrization for the leading order terms in a momentum power expansion of a non-universal Lorentz-violating, but rotational invariant, kinematics and its implications for two-body decay thresholds. The considered framework includes not only modified dispersion relations for particles, but also modified energy-momentum conservation laws, something which goes beyond effective field theory. As a particular and relevant example, bounds on the departures from special relativistic kinematics from the non-observation of vacuum Cherenkov radiation are discussed and compared with those obtained within the effective field theory scenario.
Keywords
Cite
@article{arxiv.1409.8181,
title = {Modified energy-momentum conservation laws and vacuum Cherenkov radiation},
author = {J. M. Carmona and J. L. Cortes and B. Romeo},
journal= {arXiv preprint arXiv:1409.8181},
year = {2017}
}
Comments
15 pages, 3 figures; some minor changes, especially an updated reference to a related work by the authors