Lepton masses and mixing angles from heterotic orbifold models

Abstract

We systematically study the possibility for realizing realistic values of lepton mass ratios and mixing angles by using only renormalizable Yukawa couplings derived from heterotic $Z_6$-I orbifold. We assume one pair of up and down sector Higgs fields. We consider both the Dirac neutrino mass scenario and the seesaw scenario with degenerate right-handed majorana neutrino masses. It is found that realistic values of the charged lepton mass ratios, $m_e/m_{\tau }$ and $m_{\mu }/m_{\tau }$, the neutrino mass squared difference ratio, $\Delta m_{31}^2/\Delta m_{21}^2$, and the lepton mixing angles can be obtained in certain cases.

22 pages, latex

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• Toward Realistic Intersecting D-Brane Models
• Searching for realistic 4d string models with a Pati-Salam symmetry -- Orbifold grand unified theories from heterotic string compactification on a Z6 orbifold
• Heterotic Brane World
• Dual Models of Gauge Unification in Various Dimensions
• Massive Neutrinos and (Heterotic) String Theory
• One-loop Yukawas on Intersecting Branes
• Flavour violation in general supergravity
• Quark masses and mixing angles in heterotic orbifold models

Cited by in corpus (18)

• Flavor structures of charged fermions and massive neutrinos
• Higher Order Couplings from Heterotic Orbifold Theory
• Flavor structure and coupling selection rule from intersecting D-branes
• The $\mu$-$\tau$ reflection symmetry of Majorana neutrinos
• Non-Factorisable Z2 times Z2 Heterotic Orbifold Models and Yukawa Couplings
• Renormalization Group Evolution of Dirac Neutrino Masses
• The $\mu -\tau$ reflection symmetry of Dirac neutrinos and its breaking effect via quantum corrections
• Neutrino Masses from the Top Down
• Dirac Neutrinos and Hybrid Inflation from String Theory
• The landscape of promising non-supersymmetric string models
• Precise predictions for Dirac neutrino mixing
• Hierarchical structure of physical Yukawa couplings from matter field Kähler metric
• A kind of prediction from string phenomenology: extra matter at low energy
• Phenomenological viability of orbifold models with three Higgs families
• More about soft terms and FCNC in realistic string constructions
• Lepton masses and mixings in orbifold models with three Higgs families
• Empirical Relationships among Lepton and Quark Masses
• Spectral Distortions at Super-Kamiokande