Possible scenario for MaVaN's as the only neutrino flavor conversion mechanism in the Sun

Abstract

Mass Varying neutrino mechanisms were proposed to link the neutrino mass scale with dark energy, addressing the coincidence problem. In some scenarios this mass can present a dependence on the baryonic density felt by neutrinos, creating an effective neutrino mass that depends both on the neutrino and baryonic densities. In this article we investigate the possibility that a neutrino effective mass is the only flavour conversion mechanism acting in neutrino oscillation experiments.We present a parameterization on the environmental effects on neutrino mass that produces the right flavour conversion probabilities for solar and terrestrial neutrinos experiments. * Electronic address: holanda@ifi.unicamp.br

Mass varying neutrinos in supernovae

“…Many articles have treated neutrino oscillation via the MaVaN mechanism [14][15][16][17][18][19][20][21][22]. We observe, nevertheless, that these articles focus on solar and atmospheric neutrinos, as well as observations from accelerators and reactors.…”

Searching for a nondiagonal mass varying mechanism in theνμ−ντsystem

“…(4), and the phase of the oscillations, proportional to (∆m 2 ) eff , have now a matter density dependence. This was the case mostly worked in the literature [16][17][18][19][20][21][22][23]. The latter case, the Hamiltonian in the mass basis is non-diagonal and for our knowledge it was not explored in the literature for atmospheric neutrino phenomenology.…”

“…(4) Most of the previous analysis of MaVaN works for the first two generations [16][17][18][19][20][21] and then theirs constrains are related to parameters of the first generation α 1 , α 2 and α 12 similar to the parameters defined in Eq. (7).…”

“…As an example e will use in this work the MaVaN density dependence as used in Ref. [19,21], given by…”

“…For the neutrino phenomenology the consequences of MaVaN's were studied for the solar and atmospheric neutrinos [16][17][18][19][20][21][22][23]. We will use the data from Super-Kamiokande (SK for now) experiment [23].…”