American Physical Society, Physical Review D, 11(85)
DOI: 10.1103/physrevd.85.113001
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The use of the vacuum lepton pair production process (! e À e þ), a viable reaction for superluminal neutrinos, to put constraints on Lorentz violations requires a dynamical framework. Different choices of dynamical matrix elements and modified dispersion relations for neutrinos, leading to numerical factors differing by 1 order of magnitude in the results for the pair production decay width, are used to show the uncertainties on these constraints.