The All-Purpose Neutrino Mass Matrix
نویسنده
چکیده
A four-parameter Majorana neutrino mass matrix is proposed, which is exactly diagonalizable with two mixing angles, one of which is π/4 and the other large but less than π/4. The form of this mass matrix allows seven realizations of the present data on atmospheric and solar neutrino oscillations: three have the normal hierarchy, two have the inverse hierarchy, and two have three nearly degenerate masses. The possible inclusion of CP violation is also discussed. With the recent addition of the SNO (Sudbury Neutrino Observatory) neutral-current data [1], the overall picture of solar neutrino oscillations [2] is becoming quite clear. Together with the well-established atmospheric neutrino data [3], the neutrino mixing matrix is now determined to a very good first approximation by
منابع مشابه
Note on the field theory of neutrino mixing
The problem of the diagonalization of the flavor-neutrino propagator matrix is investigated in the theory with flavor-mixing mass terms in Lagrangian. For this purpose we examine one-pole structures of flavor-neutrino propagators, leading to physical neutrino masses, and discuss the relation of the propagator diagonalizaion to the diagonalizaion of the mass matrix in Lagrangian. In connection w...
متن کاملPhenomenological Analysis of Lepton and Quark Mass Matrices
We propose a model that all quark and lepton mass matrices originally have the same zero texture. Namely their (1,1), (1,3) and (3,1) components are zeros. For the neutrino mass matrix, we further impose the symmetry between the second and the third generations. Then the neutrino mass matrix has a maximal νμ ντ mixing. Our model is consistent with all the neutrino oscillation experiments and th...
متن کاملStability of the Lepton-Flavor Mixing Matrix Against Quantum Corrections
Recent neutrino experiments suggest the strong evidences of tiny neutrino masses and the lepton-flavor mixing. Neutrino-oscillation solutions for the atmospheric neutrino anomaly and the solar neutrino deficit can determine the texture of neutrino mass matrix according to the neutrino mass hierarchies as Type A: m3 ≫ m2 ∼ m1, Type B: m3 ≪ m2 ∼ m1, and Type C: m3 ∼ m2 ∼ m1. In this paper we stud...
متن کاملModel of Geometric Neutrino Mixing
Current neutrino oscillation data from solar, atmospheric, and reactor experiments are consistent with the neutrino mixing matrix elements taking values sin θ12 = 1/3, sin θ23 = 1/2, and sin 2 θ13 = 0. We present a class of renormalizable gauge models which realize such a geometric mixing pattern naturally. These models, which are based on the non–Abelian discrete symmetry A4, place significant...
متن کاملCollider Verification of the Neutrino Mass Matrix in Two Scenarios
If the origin of neutrino mass is at the TeV energy scale, collider experiments may in fact map out all the elements of the 3 × 3 neutrino mass matrix, up to an overall scale. Two examples [1, 2] are discussed and one is related [3] to the muon anomalous magnetic moment. ————– Talk given at the 9th International Workshop on “Neutrino Telescopes” (Venice, Italy) March 6-9, 2001.
متن کامل