Laboratory Bounds on Electron Lorentz Violation

TL;DR

This paper establishes new, reliable laboratory bounds on electron Lorentz violation coefficients by analyzing synchrotron radiation and TeV photon observations, improving constraints on fundamental symmetry violations.

Contribution

It provides the first bounds on electron Lorentz violation coefficients from laboratory measurements, specifically using synchrotron energy loss data and high-energy photon observations.

Findings

New bounds on electron Lorentz violation coefficients c_(TJ) at 3 x 10^(-13) to 6 x 10^(-15) levels.

Laboratory measurements offer the most reliable constraints despite not being numerically the strongest.

Constraints are derived from synchrotron radiation data at LEP and TeV photon survival observations.

Abstract

Violations of Lorentz boost symmetry in the electron and photon sectors can be constrained by studying several different high-energy phenomenon. Although they may not lead to the strongest bounds numerically, measurements made in terrestrial laboratories produce the most reliable results. Laboratory bounds can be based on observations of synchrotron radiation, as well as the observed absences of vacuum Cerenkov radiation. Using measurements of synchrotron energy losses at LEP and the survival of TeV photons, we place new bounds on the three electron Lorentz violation coefficients c_(TJ), at the 3 x 10^(-13) to 6 x 10^(-15) levels.