Gauged Flavor, Supersymmetry and Grand Unification

Abstract

I review a recent work on gauged flavor with left-right symmetry, where all masses and all Yukawa couplings owe their origin to spontaneous flavor symmetry breaking. This is suggested as a precursor to a full understanding of flavor of quarks and leptons. An essential ingredient of this approach is the existence of heavy vector-like fermions, which is the home of flavor, which subsequently gets transmitted to the familiar quarks and leptons via the seesaw mechanism. I then discuss implications of extending this idea to include supersymmetry and finally speculate on a possible grand unified model based on the gauge group $SU(5{)}_L\times SU(5{)}_R$ which provides a group theoretic origin for the vector-like fermions.

Invited talk at the GUT 2012 workshop held in Kyoto, Japan in March, 2012

Cited by in corpus (13)

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• Dynamical flavor origin of ${\mathbb{Z}}_N$ symmetries
• A Collective Breaking of R-Parity
• Large ${\theta }_{13}^{\nu }$ and Unified Description of Quark and Lepton Mixing Matrices
• Yukawaon Model with Anomaly Free Set of Quarks and Leptons in a U(3) Family Symmetry
• Neutrino Mass Matrix Model with a Bilinear Form
• Quark and Lepton Mass Matrix Model with Only Six Family-Independent Parameters
• Lepton-flavour violation in a Pati-Salam model with gauged flavour symmetry
• Universal Bilinear Form of Quark and Lepton Mass Matrices
• Origin of Hierarchical Structures of Quark and Lepton Mass Matrices
• Leptonic $CP$ violating Phase in the Yukawaon Model