U ( 2 ) and Maximal Mixing of ν μ ∗
نویسنده
چکیده
A U (2) flavor symmetry can successfully describe the charged fermion masses and mixings, and supress SUSY FCNC processes, making it a viable candidate for a theory of flavor. We show that a direct application of this U (2) flavor symmetry automatically predicts a mixing of 45 o for ν µ ⇒ ν s , where ν s is a light, right-handed state. The introduction of an additional flavor symmetry acting on the right-handed neutrinos makes the model phenomenologically viable, explaining the solar neutrino deficit as well as the atmospheric neutrino anomaly, while giving a potential hot dark matter candidate and retaining the theory's predictivity in the quark sector.
منابع مشابه
7 v 2 6 N ov 2 00 0 ( August 2000 ) Bottom - up model for maximal ν μ − ν τ mixing
We construct a model which provides maximal mixing between a pseudoDirac νμ/ντ pair, based on a local U(1)Lμ−Lτ symmetry. Its strengths, weaknesses and phenomenological consequences are examined. The mass gap necessitated by the pseudo-Dirac structure is most naturally associated with the LSND anomaly. The solar neutrino problem then requires a light mirror or sterile neutrino. By paying a fine...
متن کاملep - p h / 00 08 17 7 v 1 1 7 A ug 2 00 0 ( August 2000 ) Bottom - up model for maximal ν μ − ν τ mixing
We construct a model which provides maximal mixing between a pseudoDirac νμ/ντ pair, based on a local U(1)Lμ−Lτ symmetry. Its strengths, weaknesses and phenomenological consequences are examined. The mass gap necessitated by the pseudo-Dirac structure is most naturally associated with the LSND anomaly. The solar neutrino problem then requires a light mirror or sterile neutrino. By paying a fine...
متن کاملMaximal ν μ − ν τ Mixing
The naturalness of maximal mixing between myon-and tau-neutri-nos is investigated. A spontaneously broken nonabelian generation symmetry can explain a small parameter which governs the deviation from maximal mixing. In many cases all three neutrino masses are almost degenerate. Maximal ν µ − ν τ-mixing would indicate that the leading contribution to the light neutrino masses arises from the exp...
متن کاملTesting maximal electron and muon neutrino oscillations with sub-GeV SuperKamiokande atmospheric neutrino data
Motivated by the Exact Parity Model and other theories, the hypothesis that each of the known neutrinos oscillates maximally with a sterile partner has been put forward as an explanation of the atmospheric and solar neutrino anomalies. We provide detailed predictions for muon and electron flux ratios induced in the Kamiokande and SuperKamiokande detectors by sub-GeV atmospheric neutrinos. Sever...
متن کامل