A TEST OF THE EQUIVALENCE PRINCIPLE BY LONG-BASELINE NEUTRINO-OSCILLATION EXPERIMENTS

Abstract
We show that a breakdown of the universality of the gravitational couplings to different neutrino flavors can be tested in long-baseline neutrino-oscillation experiments. In particular we have analyzed in detail a proposed experiment at SOUDAN 2 with νμ beams from the Fermilab Main Injector. It turns out that we can study both masses of neutrinos and such a breakdown with sensitivity to the order of 10−14 by investigating the energy spectrum of the resulting muons.

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