TeV Astrophysics Constraints on Planck Scale Lorentz Violation
Abstract
We analyze observational constraints from TeV astrophysics on Lorentz violating nonlinear dispersion for photons and electrons without assuming any a priori equality between the photon and electron parameters. The constraints arise from thresholds for vacuum Cerenkov radiation, photon decay and photo-production of electron-positron pairs. We show that the parameter plane for cubic momentum terms in the dispersion relations is constrained to an order unity region in Planck units. We find that the threshold configuration can occur with an asymmetric distribution of momentum for pair creation, and with a hard photon for vacuum Cerenkov radiation.
Cite
@article{arxiv.hep-ph/0112207,
title = {TeV Astrophysics Constraints on Planck Scale Lorentz Violation},
author = {Ted Jacobson and Stefano Liberati and David Mattingly},
journal= {arXiv preprint arXiv:hep-ph/0112207},
year = {2009}
}
Comments
4 pages, RevTeX4, 1 figure. Some references and a footnote added, improved discussion on the photon annihilation and GZK cutoff. Minor changes of wording. Main results unchanged. Version to appear as a Rapid Communication in PRD