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- Naoyuki Haba, Nobuhito Maru
- 2008

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)

- Naoyuki Haba, Masatomi Harada, Yutaka Hosotani, Yoshiharu Kawamura
- 2008

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)

- Naoyuki Haba, Yutaka Hosotani, Yoshiharu Kawamura
- 2004

The dynamical determination of the boundary conditions in SU (N) gauge theory on the orbifold S 1 /Z2 is investigated. We classify the equivalence classes of the boundary conditions, and then the vacuum energy density of the theory in each equivalence class is evaluated at one loop order. Unambiguous comparison of the vacuum energy densities in the two… (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 show the general formula of the one loop effective potential of the 5D SU (N) gauge theory compactified on an orbifold, S 1 /Z 2. The formula shows the case when there are fundamental, (anti-)symmetric tensor and adjoint representational bulk fields. Our calculation method is also applicable when there are bulk fields belonging to higher dimensional… (More)

- Naoyuki Haba, Yutaka Hosotani, Yoshiharu Kawamura, Toshifumi Yamashita
- 2004

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)

- Naoyuki Haba
- 2008

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)

- Marc-Thomas Eisele, Naoyuki Haba
- 2008

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)

- Naoyuki Haba, Shigeki Matsumoto, Nobuchika Okada, Toshifumi Yamashita
- 2008

The gauge-Higgs unification is one of influential scenarios to solve the hierarchy problem in the Standard Model. Recently, the scenario on the warped background attracts many attentions due to a large possibility to construct a

- Naoyuki Haba
- 2006

In the 5D theory in which only 3 generation right-handed neutrinos are in the bulk, the neutrino flavor mixings and the mass spectrum can be constructed through the seesaw mechanism. The 5D seesaw is easily calculated just by a replacement of the Majorana mass eigenvalues, M i , by tan(h)[πRM i ] (R: compactification scale). The 5D features appear when the… (More)