Naturally Light Higgs Doublet in the Spinor Representation of SUSY SO(10)

Abstract

Within the supersymmetric SO(10) GUT we explore the possibility of the light Higgs doublet being a member of the 16-dimensional spinorial representation. This fact is ultimately related with the assumption that the light matter (at least partially) resides in some of the tensor representations as well. Several interesting features emerge. First, provided that the same 16-plet is responsible for the breaking $SO(10)\to SU(5)$, the heaviness of the top can automatically follow from the field content at $M_{GUT}$, without need of any flavour symmetries. Secondly, the doublet--triplet splitting problem receives a new natural solution. In addition, a dimension=5 (Higgsino mediated) proton decay can be naturally suppressed. We construct explicit SO(10) models with the above properties, with most general superpotentials under the symmetries.

13 pages, Latex

Cited by in corpus (15)

• The minimal supersymmetric grand unified theory
• SO(10) theory of R-parity and neutrino mass
• Predictive Grand Unified Textures for Quark and Neutrino Masses and Mixings
• Construction of a Minimal Higgs SO(10) SUSY GUT Model
• Eliminating the d=5 proton decay operators from SUSY GUTs
• The problem of neutrino masses in extensions of the Standard Model
• On Supersymmetric b-tau Unification, Gauge Unification, and Fixed Points
• The top quark mass and flavor mixing in a Seesaw model of Quark Masses
• A New Doublet-Triplet Splitting Mechanism for Supersymmetric SO(10) and Implications for Fermion Masses
• A framework for baryonic R-parity violation in grand unified theories
• Fine Structure Constant Variation from a Late Phase Transition
• Minimal Flipped SO(10) x U(1) Supersymmetric Higgs Model
• On suppressing the Higgsino-mediated proton decay in SUSY SO(10) GUT's
• The Problem of α_s in Supersymmetric Unified Theories
• Constraining scalars of $16_H$ through proton decays in non-renormalisable $SO(10)$ models