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We consider a modification of electrodynamics in which right- and left-circularly polarized photons are coupled to charged sources differently. Even though photon helicity is a Lorentz invariant quantity, such a modification breaks Lorentz symmetry, as well as locality. The modified theory includes novel magnetic forces between perpendicular currents. Existing data can be used to constrain the modification at approximately a 2 x 10^(-3) level.

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APA Citation

Altschul, B. (2013). Neutrino beam constraints on flavor-diagonal Lorentz violation. Physical Review D, 87(9).

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