Solitons and precision neutrino mass spectroscopy

Determining Neutrino Mass Hierarchy by Precision Measurements in Electron and Muon Neutrino Disappearance Experiments

Recently a new method for determining the neutrino mass hierarchy by comparing the effective values of the atmospheric ∆m measured in the electron neutrino disappearance channel, ∆m(ee), with the one measured in the muon neutrino disappearance channel, ∆m(μμ), was proposed. If ∆m(ee) is larger (smaller) than ∆m(μμ) the hierarchy is of the normal (inverted) type. We re-examine this proposition i...

Low-Energy Neutrino Physics and Neutrino Mass

Neutrino Trapping and Neutrino Mass Bounds

It has been shown recently that the exchange of virtual νν̄ pairs leads to an unphysically large energy-density in neutron stars and white dwarfs, unless neutrinos have a minimum mass,mν > ∼ 0.4 eV/c 2 . Here we consider the possibility that the presence of trapped low-energy neutrinos can suppress the exchange of virtual νν̄ pairs, thereby avoiding a large energy-density even for massless neutri...

Bimaximal Neutrino Mixing and Neutrino Mass Matrix

We show that the bimaximal neutrino mixing pattern suggested by the solar and atmospheric neutrino data can be derived from the maximal, symmetric , four neutrino mixing in the limit that one of the neutrinos is made heavy. Imposing the constraints of no neutrinoless double beta decay and a 20% hot dark matter component of the universe leads to a three neutrino mass matrix recently suggested by...

Supersymmetry and neutrino mass

The existence of neutrino mass and mixing is a strong pointer towards physics beyond the standard model. An overview of the possibility of having neutrino masses in supersymmetric theories is attempted here. Some of the recent works reviewed suggest Dirac masses, whereas others include Majorana masses as well. Side by side, it is shown how R-parity violating supersymmetry opens new avenues in t...