Astrophysical Limits on Lorentz Violation for All Charged Species
Abstract
If Lorentz violation exists, it will affect the thresholds for pair creation processes. Lorentz-violating operators that change the maximum velocities of charged particles may increase or decrease the extinction rate of gamma-rays moving through space. If the emissions from high-energy astrophysical sources do not show any signs of anomalous absorption, this allows us to place bounds on the Lorentz-violating c coefficients for multiple species of charged particles. The bounds for a species of mass mX based on observing photons at an energy E can be O(mX2/E2), which corresponds to limits at the 10(-15)(mX2/me2) level for the most energetic photons.
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