Muon Anomalous Magnetic Moment and τ → μ γ in a Realistic String - Inspired Model of Neutrino Masses
نویسندگان
چکیده
We discuss the lepton sector of a realistic string-inspired model based on the Pati-Salam SU(4) × SU(2) L × SU(2) R gauge group supplemented by a U(1) family symmetry. The model involves third family Yukawa unification, predicts large tan β ∼ 50, and describes all fermion masses and mixing angles, including approximate bi-maximal mixing in the neutrino sector. Atmospheric neutrino mixing is achieved via a large 23 entry in the neutrino Yukawa matrix which can have important phe-nomenological effects. We find that the recent BNL result on the muon (g − 2) can be easily accommodated in a large portion of the SUSY parameter space of this model. Over this region of parameter space the model predicts a CP-even Higgs mass near 115 GeV, and a rate for τ → µ + γ which is close to its current experimental limit.
منابع مشابه
Nearly Bi-Maximal Neutrino Mixing, Muon g-2 Anomaly and Lepton-Flavor-Violating Processes
We interpret the newly observed muon g-2 anomaly in the framework of a leptonic Higgs doublet model with nearly degenerate neutrino masses and nearly bi-maximal neutrino mixing. Useful constraints are obtained on the rates of lepton-flavor-violating rare decays τ → μγ, μ → eγ and τ → eγ as well as the μ-e conversion ratio Rμe. We find that Γ(μ → eγ), Γ(τ → eγ) and Rμe depend crucially on possib...
متن کاملMuon anomalous magnetic moment, lepton flavor violation, and flavor changing neutral current processes in SUSY GUT with right-handed neutrino
Motivated by the large mixing angle solutions for the atmospheric and solar neutrino anomalies, flavor changing neutral current processes and lepton flavor violating processes as well as the muon anomalous magnetic moment are analyzed in the framework of SU(5) SUSY GUT with right-handed neutrino. In order to explain realistic mass relations for quarks and leptons, we take into account effects o...
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 کاملGauged Lμ–Lτ with Large Muon Anomalous Magnetic Moment and the Bimaximal Mixing of Neutrinos
We consider the gauging of Lμ − Lτ as an explanation of a possibly large muon anomalous magnetic moment. We then show how neutrino masses with bimaximal mixing may be obtained in this framework. We study the novel phenomenology of the associated gauge boson in the context of present and future high-energy collider experiments. In the minimal standard model of quarks and leptons with no right-ha...
متن کاملEmanations of Dark Matter: Muon Anomalous Magnetic Moment, Radiative Neutrino Mass, and Novel Leptogenesis at the TeV Scale
The evidence for dark matter signals a new class of particles at the TeV scale, which may manifest themselves indirectly through loop effects. In a simple model we show that these loop effects may be responsible for the enhanced muon anomalous magnetic moment, for the neutrino mass, as well as for leptogenesis in a novel way. This scenario can be verified at LHC experiments. There are at presen...
متن کامل