Regular Article - Theoretical Physics
Is the Lorentz limiting speed equal to the speed of light? Photons vs neutrino tests
Service de Physique Théorique, Université Libre de Bruxelles, 1050, Brussels, Belgium
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Revised: 20 September 2012
Published online: 30 November 2012
We discuss the possibility that the “limiting speed” c limit (c l ) appearing in Lorentz equations might be different (i.e. slightly larger) than the observed speed of light c n . We show that such a possibility can be tested by state-of-the-art Michelson–Morley experiments, but also by careful measurement of neutrino speeds. It would indeed suffice to show that c n <c ν ≤c l . Quite interestingly, current limits from both approaches are competitive, in some circumstances. We also comment on competing tests using gamma-ray burst, assuming a dispersive character for the propagation of light.
© Springer-Verlag Berlin Heidelberg and Società Italiana di Fisica, 2012