Prog. Theor. Phys. Vol. 65 No. 3 (1981) pp. 1058-1067
Effect of a Background Gravitational Field on the Velocity of Neutrinos
Department of Physics, Osaka University, Toyonaka 560
(Received October 20, 1980)
We calculate neutrino velocity, in a background gravitational field on the basis of the Weinberg-Salam model and the general theory of relativity. We get an unexpected result which apparently contradicts with the equivalence principle. The neutrino velocity is greater than the ordinary light velocity c for some background metrics. The origin of this effect is that the neutrino, being virtually a pair of e--W+ or ν-Z, gets a quantum field theoretical space-time extension and feels tidal force. We discuss the relation between our result and the macro-causality.
DOI : 10.1143/PTP.65.1058
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