Naoyuki Haba

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High-precision analyses of supersymmetry parameters aim at reconstructing the fundamental supersymmetric theory and its breaking mechanism. A well defined theoretical framework is needed when higher-order corrections are included. We propose such a scheme, Supersymmetry Parameter Analysis SPA, based on a consistent set of conventions and input parameters. A(More)
We construct a model of direct gauge mediation of metastable SUSY breaking by simply deforming the Intriligator, Seiberg and Shih model in terms of a dual meson superpotential mass term. No extra matter field is introduced. The deformation explicitly breaks a U(1) R symmetry and a pseudo moduli have a nonzero VEV at one-loop. Our metastable SUSY breaking(More)
Gauge theory defined on the orbifold M 4 × (S 1 /Z 2) is investigated from the viewpoint of the Hosotani mechanism. Rearrangement of gauge symmetry takes place due to the dynamics of Wilson line phases. The physical symmetry of the theory, in general, differs from the symmetry of the boundary conditions. Several sets of boundary conditions having distinct(More)
A new framework for handling flavor symmetry breaking in the neutrino sector is discussed where the source of symmetry breaking is traced to the global property of right-handed neutrinos in extra-dimensional space. Light neutrino phenomenology has rich and robust predictions such as the tribimaximal form of generation mixing, controlled mass spectrum, and(More)
We study the dynamical symmetry breaking in the gauge-Higgs unification of the 5D theory compactified on an orbifold, S 1 /Z 2. This theory identifies Wilson line degrees of freedoms as " Higgs doublets ". We consider SU (3) c × SU (3) W and SU (6) models with the compactification scale of order a few TeV. The gauge symmetries are reduced to SU (3) c × SU(More)
The Superkamiokande experiment suggests the large flavor mixing between ν µ and ν τ. We show that the mixing angle receives significant corrections from the renormalization group equation (RGE) when both the second and the third generation neutrino masses are larger than O(0.1eV). This means that the mixing angle must be small at the decoupling scale of(More)
We analyze a supersymmetry (SUSY) breaking model proposed by In-triligator, Seiberg and Shih in a supergravity (SUGRA) framework. This is a simple and natural setup which demands neither extra superpotential interactions nor an additional gauge symmetry. In the SUGRA setup, the U(1) R symmetry is explicitly broken by the constant term in the(More)
Recent neutrino experiments suggest the strong evidences of tiny neutrino masses and the lepton-flavor mixing. Neutrino-oscillation solutions for the atmospheric neu-trino anomaly and the solar neutrino deficit can determine the texture of neutrino mass matrix according to the neutrino mass hierarchies as Type A: m 3 ≫ m 2 ∼ m 1 , Type B: m 3 ≪ m 2 ∼ m 1 ,(More)
We consider several neutrino mass models in an extra-dimensional setting on a quantitative basis. All the models are set in a five-dimensional scenario, with the standard model particles living on a brane, while three additional right-handed neu-trinos live in the bulk of a compactified S 1 /Z 2 orbifold extra-dimension. An additional continuous U (1)(More)