Symmetry breaking, and the effect of matter density on neutrino oscillation

Abstract

A proposal for the neutrino mass, based on neutrino-scalar field interaction, is introduced. The scalar field is also non-minimally coupled to the Ricci scalar, and hence relates the neutrino mass to the matter density. In a dense region, the scalar field obeys the Z 2 symmetry, and the neutrino is massless. In a dilute region, the Z 2 symmetry breaks and neutrino acquires mass from the non-vanishing expectation value of the scalar field. We consider this scenario in the framework of a spherical dense object whose outside is a dilute region. In this background, we study the neutrino flavors oscillation, along with the consequences of the theory on oscillation length and MSW effect. This preliminary model may shed some lights on the existing anomalies within the neutrino data, concerning the different oscillating behavior of the neutrinos in regions with different densities. * mohsenisad@ut.ac.ir

Using Neutrino Oscillations to Measure $H_0$

“…It should be noted that there have been a great deal of work in the literature done on neutrinos as spinors in curved spacetime. We direct the interested reader to a few of them and references therein [16,17,18,19,20,21,22,23,24,25,26].…”

Cosmic acceleration and de Sitter expansion in hybrid mass varying neutrino model

“…For a Higgs like potential, this triggers the evolution of the quintessence. This idea was proposed and employed in the symmetron cosmology model [23][24][25], and is based on Z 2 symmetry breaking. However, in the symmetron model, through the symmetry breaking, the quintessence potential becomes negative unless we add a cosmological constant to the theory to provide the positive potential required for the acceleration [26].…”