Violation of the equivalence principle in the light of the SNO and SK solar neutrino results

Raychaudhuri, Amitava ; Sil, Arunansu (2002) Violation of the equivalence principle in the light of the SNO and SK solar neutrino results Physical Review D - Particles, Fields, Gravitation and Cosmology, 65 (7). 073035_1-073035_6. ISSN 1550-7998

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Official URL: http://prd.aps.org/abstract/PRD/v65/i7/e073035

Related URL: http://dx.doi.org/10.1103/PhysRevD.65.073035

Abstract

The Sudbury Neutrino Observatory (SNO) result on charged current deuteron disintegration, the Super Kamiokande 1258-day data on electron scattering, and other solar neutrino results are used to reexamine the model of neutrino oscillations driven by a violation of the equivalence principle. We use a χ2 minimization technique to examine oscillations between the νe and another active neutrino, both massless, and find that within the standard solar model the fit to the SNO and Super-Kamiokande spectra is moderately good while a very good fit is obtained when the absolute normalizations of the 8B and 3He+p (hep) neutrino fluxes are allowed to vary. The fit to the total rates from the different experiments is not encouraging but when the rates and spectra are considerd together the situation is much improved. The best fit prefers maximal mixing, essentially no hep neutrinos, and a 23% reduction in the 8B neutrino flux. We remark on the expectations of the violation of the equivalence principle model for the neutral current measurements at SNO.

Item Type:Article
Source:Copyright of this article belongs to The American Physical Society.
ID Code:43204
Deposited On:10 Jun 2011 08:54
Last Modified:18 May 2016 00:17

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