K. Iida et al., A TEST OF THE EQUIVALENCE PRINCIPLE BY LONG-BASE-LINE NEUTRINO-OSCILLATION EXPERIMENTS, Modern physics letters A, 8(11), 1993, pp. 1037-1046
We show that a breakdown of the universality of the gravitational coup
lings to different neutrino flavors can be tested in long-baseline neu
trino-oscillation experiments. In particular we have analyzed in detai
l a proposed experiment at SOUDAN 2 with nu(mu) beams from the Fermila
b Main Injector. It turns out that we can study both masses of neutrin
os and such a breakdown with sensitivity to the order of 10(-14) by in
vestigating the energy spectrum of the resulting muons.