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.
Digital Object Identifier (DOI)
Published in Physical Review D, Volume 87, Issue 9, 2012.
© 2013 American Physical Society
Altschul, B. (2013). Neutrino beam constraints on flavor-diagonal Lorentz violation. Physical Review D, 87(9). https://doi.org/10.1103/physrevd.87.096004