Neutrino Masses and Anomalous Interactions
نویسنده
چکیده
The interplay between neutrino masses and the interactions of neutrinos with matter is discussed with an eye to extending the latter to include possible new interactions. This conjecture may resolve the conundrum posed by the present experimental data on neutrino oscillations which suggest the existence of four neutrinos, whereas Z decay and Big Bang Nucleosynthesis allow only three. The case of a possible sterile neutrino is also briefly discussed.
منابع مشابه
Models of Neutrino Mass and Interactions for Neutrino Oscillations
I review the various mechanisms for obtaining nonzero neutrino masses. I focus on the possibility of adding one light singlet neutrino to the three known doublet neutrinos νe, νμ, and ντ to accommodate the totality of neutrino-oscillation experiments. I review the various theoretical suggestions for this singlet. I discuss also a scenario in which there are only the three doublet neutrinos but ...
متن کاملElectroweak Baryon Number Violation and Constraints on Left-handed Majorana Neutrino Masses
During a large period of time, the anomalous baryon number violating interactions are in equilibrium, when the (B+L) asymmetry is washed out. If there is any lepton number violation during this period, that will also erase the (B −L) asymmetry. As a result, survival of the baryon asymmetry of the universe pose strong constraints on lepton number violating interactions. We review here the constr...
متن کاملGauge Trimming of Neutrino Masses
We show that under a new U(1) gauge symmetry, which is non-anomalous in the presence of one “right-handed neutrino” per generation and consistent with the standard model Yukawa couplings, the most general fermion charges are determined in terms of four rational parameters. This generalization of the B − L symmetry with generation-dependent lepton charges leads to neutrino masses induced by oper...
متن کاملSupersymmetric Model of Muon Anomalous Magnetic Moment and Neutrino Masses
We propose the novel lepton-number relationship Lτ = Le + Lμ, which is uniquely realized by the interaction (ν̂eμ̂ − êν̂μ)τ̂ c in supersymmetry and may account for a possibly large muon anomalous magnetic moment. Neutrino masses (with bimaximal mixing) may be generated from the spontaneous and soft breaking of this lepton symmetry. In the minimal standard model of particle interactions, the 3 lepto...
متن کاملGrand Unification with Anomalous U(1) Symmetry
In this talk, we introduce a new scenario of grand unified theory (GUT) with anomalous U(1)A gauge symmetry. Since generic interactions (including non-renormalizable interactions) are introduced, once we fix the symmetry of the theory, we can define the theory without O(1) coefficients. The number of parameters to determine the symmetry is just 11 or 12 integer parameters which are anomalous U(...
متن کامل