Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-03-12
Phys.Lett. B591 (2004) 1-6
Physics
High Energy Physics
High Energy Physics - Phenomenology
references added, small changes in text, some changes in predictions of KamLAND future sensitivity to NSNI parameters
Scientific paper
10.1016/j.physletb.2004.04.035
We show that the non-standard neutrino interactions can play a role as sub-leading effect on the solar neutrino oscillations. We observe that very small flavor universality violations of order of 0.1-0.2 G_F is sufficient to induce two phenomena: suppression of the eletronic neutrino earth regeneration and a shift of the resonance layer in the sun. We obtain these phenomena even in the absence of any flavor changing interactions. We discuss their consequences and confront with a global analysis of solar+KamLAND results. We conclude that a new compatibility region in the Delta m^2 x tan^2\theta, which we call very low Large Mixing Angle region, is found for Delta m^2 ~ 1e-5 eV^2 and tan^2\theta= 0.45.
de Holanda Pedro Cunha
Guzzo Marcelo M.
Peres Orlando L. G.
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