Testing the principle of equivalence by solar neutrinos
- Department of Physics, Tokyo Metropolitan University, 1-1 Minami-Osawa Hachioji,Tokyo 192-03 (Japan)
- Theory Group, National Laboratory for High Energy Physics (KEK), 1-1 Oho, Tsukuba-shi, Ibaraki-ken, 305 (Japan)
We discuss the possibility of testing the principle of equivalence with solar neutrinos. If there exists a violation of the equivalence principle, quarks and leptons with different flavors may not universally couple with gravity. The method we discuss employs the quantum mechanical phenomenon of neutrino oscillation to probe into the nonuniversality of the gravitational couplings of neutrinos. We develop an appropriate formalism to deal with neutrino propagation under the weak gravitational fields of the Sun in the presence of the flavor mixing. We point out that solar neutrino observation by the next generation water Cherenkov detectors can place stringent bounds on the violation of the equivalence principle to 1 part in 10{sup 15}--10{sup 16} if the nonadiabatic Mikheyev-Smirnov-Wolfenstein mechanism is the solution to the solar neutrino problem.
- OSTI ID:
- 55962
- Journal Information:
- Physical Review, D, Vol. 51, Issue 12; Other Information: PBD: 15 Jun 1995
- Country of Publication:
- United States
- Language:
- English
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