Implications of Anomalous U(1) Symmetry in Unified Models: the Flipped SU(5) x U(1) Paradigm

Abstract

A generic feature of string-derived models is the appearance of an anomalous Abelian U(1)_A symmetry which, among other properties, constrains the Yukawa couplings and distinguishes the three families from each other. In this paper, we discuss in a model-independent way the general constraints imposed by such a U(1)_A symmetry on fermion masses, R-violating couplings and proton-decay operators in a generic flipped SU(5) x U(1)' model. We construct all possible viable fermion mass textures and give various examples of effective low-energy models which are distinguished from each other by their different predictions for B-, L- and R-violating effects. We pay particular attention to predictions for neutrino masses, in the light of the recent Super-Kamiokande data.

28 pages, reference added

References in corpus (2)

• Standard-like Models with Broken Supersymmetry from Type I String Vacua
• New fermion mass textures from anomalous U(1) symmetries with baryon and lepton number conservation

Cited by in corpus (14)

• Anatomy and Phenomenology of FCNC and CPV Effects in SUSY Theories
• Anomalous Flavor U(1)_X for Everything
• ${\mathcal{R}}^2$ inflation from scale invariant supergravity and anomaly free superstrings with fluxes
• The Seesaw Mechanism in Quark-Lepton Complementarity
• Update on Fermion Mass Models with an Anomalous Horizontal U(1) Symmetry
• Bounds on Broken R-Parity from Leptonic Meson Decays
• Large Angle MSW Solution in Grand Unified Theories with SU(3) X U(1) Horizontal Symmetry
• Majorana Neutrino Masses from Anomalous U(1) Symmetries
• Small Dirac Neutrino Masses and R-parity from Anomalous U(1) Symmetry
• Bilarge Neutrino Mixing and Abelian Flavor Symmetry
• Extracting the Flavour Structure of a Baryon-Number R-parity Violating Coupling at the LHC
• Flat Directions in Flipped SU(5) I: All-Order Analysis
• Fermion masses and proton decay in string-inspired SU(4)*SU(2)^2*U(1)_X
• Model Characterization and Dark Matter in the Secluded $U(1{)}^{\prime }$ Model