SUSY GUT with automatic doublet-triplet hierarchy |
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| Institution: | 1. Physics Program, Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima 739-8526, Japan;2. Core of Research for the Energetic Universe, Hiroshima University, Higashi-Hiroshima 739-8526, Japan;1. Departamento de Física, Universidade Federal de Campina Grande, Campina Grande, PB, Brazil;2. Instituto de Física Teórica, Universidade Estadual Paulista, SP, Brazil;3. Departamento de Física, Universidade Federal da Paraíba, Caixa Postal 5008, 58051-970, João Pessoa, PB, Brazil;4. International Institute of Physics, Universidade Federal do Rio Grande do Norte, Campus Universitário, Lagoa Nova, Natal-RN 59078-970, Brazil |
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| Abstract: | A mechanism is suggested to resolve the problem of doublet-triplet hierarchy in the SU(5) SUSY GUT. In this mechanism, which we call “GIFT” (“Goldstones instead of fine tuning”), the doublets are pseudo-Goldstone bosons of a certain broken global symmetry of the superpotential. With supergravity as the source of SUSY breaking we show that the SU(2)L×U(1)Y→U(1)em breaking as well as the mass of the lightest Higgs boson are due to the radiative corrections. |
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