Tachyons as a Consequence of Light-Cone Reflection Symmetry

We introduce a new symmetry, light-cone reflection (LCR), which interchanges timelike and spacelike intervals. Our motivation is to provide reason, based on why tachyons might exist, with emphasis application neutrinos. show that LCR, combined translations, leads much larger symmetry. construct an LCR-invariant Lagrangian discuss some of its properties. In simple example, we find complete symmetry in the spectrum between ordinary particles. also theory allows for introduction further gauge invariance related chiral