Froggatt-Nielsen hierarchy and the neutrino mass matrix

2008/05/09 by Hiroshi Kamikado, Kamikado, Hiroshi, Tetsuo Shindou +3 · 2 citations
Computer Science · Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Computational Physics and Python Applications #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)

paper · pdf · doi:10.48550/arxiv.0805.1338

openalex publication_date 2008/05/09 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We study the neutrino mass matrix derived from the seesaw mechanism in which the neutrino Yukawa couplings and the heavy Majorana neutrino mass matrix are controlled by the Froggatt-Nielsen mechanism. In order to obtain the large neutrino mixings, two Froggatt-Nielsen fields are introduced with a complex vacuum expectation values. As a by-product, CP violation is systematically induced even if the order one couplings of FN fields are real. We show several predictions of this model, such as theta₁₃, the Dirac CP phase, two Majorana CP phases, the effective mass of the neutrinoless double beta decay and the leptogenesis. The prediction of the branching ratio of mu to e+gamma is also given in SUSY model.

Cited by

• Lepton flavor from a horizontal symmetry in a slice of AdS₅
• Froggatt-Nielsen like mechanism in the framework of Modular Symmetry for Neutrino Mass, Mixing and Leptogenesis

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