Higgs Mass Textures in Flipped SU(5)
John Ellis (CERN), G.K. Leontaris (CERN, Ioannina), J. Rizos, (Ioannina)
TL;DR
This paper investigates the Higgs mass splitting in flipped SU(5) derived from string theory, proposing a pattern of field vevs that naturally keeps the electroweak Higgs doublets light while others are heavy, with implications for fermion mass hierarchies.
Contribution
It introduces a novel pattern of field vevs in string-derived flipped SU(5) that achieves Higgs doublet-triplet splitting and predicts lighter second-generation fermions.
Findings
Successful Higgs doublet-triplet splitting via vev pattern
Prediction of lighter second-generation fermions
Utilization of missing-doublet mechanism
Abstract
We analyze the Higgs doublet-triplet mass splitting problem in the version of flipped SU(5) derived from string theory. Analyzing non-renormalizable terms up to tenth order in the superpotential, we identify a pattern of field vev's that keeps one pair of electroweak Higgs doublets light, while all other Higgs doublets and all Higgs triplets are kept heavy, with the aid of the economical missing-doublet mechanism found in the field-theoretical version of flipped SU(5). The solution predicts that second-generation charge -1/3 quarks and charged leptons are much lighter than those in the third generation.
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