Synchrotron and Inverse Compton Constraints on Lorentz Violations for Electrons

Abstract

We present a method for constraining Lorentz violation in the electron sector, based on observations of the photons emitted by high-energy astrophysical sources. The most important Lorentz-violating operators at the relevant energies are parameterized by a tensor c^{nu mu) with nine independent components. If c is nonvanishing, then there may be either a maximum electron velocity less than the speed of light or a maximum energy for subluminal electrons; both these quantities will generally depend on the direction of an electron's motion. From synchrotron radiation, we may infer a lower bound on the maximum velocity, and from inverse Compton emission, a lower bound on the maximum subluminal energy. With observational data for both these types of emission from multiple celestial sources, we may then place bounds on all nine of the coefficients that make up c. The most stringent bound, on a certain combination of the coefficients, is at the 6 x 10^(-20) level, and bounds on the coefficients individually range from the 7 x 10^(-15) level to the 2 x 10^(-17) level. For most of the coefficients, these are the most precise bounds available, and with newly available data, we can already improve over previous bounds obtained by the same methods.

28 pages

References in corpus (8)

• Test of Lorentz Invariance in Electrodynamics Using Rotating Cryogenic Sapphire Microwave Oscillators
• Gauge Invariance and the Pauli-Villars Regulator in Lorentz- and CPT-Violating Electrodynamics
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• The radio-ultraviolet spectral energy distribution of the jet in 3C273
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• Lorentz Violation and Synchrotron Radiation
• Velocity in Lorentz-Violating Fermion Theories

Cited by in corpus (12)

• Electrodynamics with Lorentz-violating operators of arbitrary dimension
• Spontaneous Lorentz and Diffeomorphism Violation, Massive Modes, and Gravity
• Limits on isotropic Lorentz violation in QED from collider physics
• Bounding Isotropic Lorentz Violation Using Synchrotron Losses at LEP
• New Bounds on Isotropic Lorentz Violation
• Finite Duration and Energy Effects in Lorentz-Violating Vacuum Cerenkov Radiation
• Astrophysical Limits on Lorentz Violation for All Charged Species
• Finite Temperature behavior of the CPT-even and parity-even electrodynamics of the Standard Model Extension
• Bounds on Spin-Dependent Lorentz Violation From Inverse Compton Observations
• Synchrotron Radiation in the Standard Model Extension
• Emission and absorption of photons and the black-body spectra in Lorentz-odd Electrodynamics
• Cavity tests of parity-odd Lorentz violations in electrodynamics