VEP oscillation solutions to the solar neutrino problem

CASINI, HORACIO; JUAN CARLOS DOLIVO; RAFAEL MONTEMAYOR

PHYSICAL REVIEW D

AMER PHYSICAL SOC

Lugar: New York; Año: 2000 vol. 61 p. 1 - 18

1550-7998

We study the solar neutrino problem within the framework of a parametrized post-Newtonian formulation for the gravitational interaction of the neutrinos, which incorporates a violation to the equivalence principle (VEP). Using the current data on the rates and the energy spectrum we find two possible oscillation solutions, both for a large mixing angle. One of them involves the MSW effect in matter and the other corresponds to vacuum oscillations. An interesting characteristic of this mechanism is that it predicts a semi-annual variation of the neutrino flux. Our analysis provides new constraints for some VEP parameters.