An extended flipped SU(5) GUT model and the fermion mass hierarchy

Ranfone, Stefano; Valle, J. W. F.

doi:10.1016/0370-2693(96)00973-2

Cited by 4 publications

(2 citation statements)

References 42 publications

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“…e.g. [29][30][31] for the flipped case in SUSY context, collectively referred to from now on as the novel symmetries. This paper deals with building and studying a realistic model utilizing these novel symmetries as an intermediate stage; this model is essentially unique in its class, as argued below.…”

Section: Introductionmentioning

confidence: 99%

A minimal supersymmetric E6 unified theory

Babu

Bajc

Susic

2015

J. High Energ. Phys.

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We show explicitly that supersymmetric E 6 Grand Unified Theory with a Higgs sector consisting of {27 + 27 + 351 ′ + 351 ′ + 78} fields provides a realistic scenario for symmetry breaking and fermion mass generation. While gauge symmetry breaking can be achieved without the 78 field, its presence is critical for a successful doublet-triplet mass splitting. The Yukawa sector of the model consists of only two symmetric matrices describing all of quark, lepton and neutrino masses and mixings. The fermion mass matrices are computed at low energy and a fit to the second and third generation masses and mixings is performed. We find a good numerical fit to the low-energy data. Thus, this model, having 11 superpotential parameters, alongside the two symmetric Yukawa matrices, seems to be the best realistic candidate for a minimal renormalizable supersymmetric E 6 unified theory.

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Section: Introductionmentioning

confidence: 99%

A minimal supersymmetric E6 unified theory

Babu

Bajc

Susic

2015

J. High Energ. Phys.

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“…Of course, if we neglect the component fields 5C and 5 C by hand, such extension becomes possible[8].…”

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confidence: 99%

Flipped SO(10) model

Maekawa

Yamashitâ

2003

Physics Letters B

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We show that as in the flipped SU(5) models, doublet-triplet splitting is realized by the missing partner mechanism in the flipped SO(10) models. The gauge group $SO(10)_F\times U(1)_{V'_F}$ includes $SU(2)_E$ gauge symmetry, that plays an important role in solving supersymmetric flavor problem by introducing non-abelian horizontal gauge symmetry and anomalous $U(1)_A$ gauge symmetry. The gauge group can be broken into the standard model gauge group by VEVs of only spinor fields, such models may be easier than $E_6$ models to be derived from the superstring theory.Comment: 12 pages, examples are correcte

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A realistic theory of E6 unification through novel intermediate symmetries

Babu,

Bajc,

Susič

2024

J. High Energ. Phys.

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We propose a non-supersymmetric E6 GUT with the scalar sector consisting of 650 ⨁ 351′ ⨁ 27. Making use of the first representation for the initial symmetry breaking to an intermediate stage, and the latter two representations for second-stage breaking to the Standard Model and a realistic Yukawa sector, this theory represents the minimal E6 GUT that proceeds through one of the intermediate stages that are novel compared to SU(5) or SO(10) GUT: trinification SU(3)C × SU(3)L × SU(3)R, SU(6) × SU(2) and flipped SO(10) × U(1). We analyze these possibilities under the choice of vacuum that preserves a ℤ2 “spinorial parity”, which disentangles the chiral and vector-like fermions of E6 and provides a dark matter candidate in the form of a (scalar) inert doublet. Three cases are shown to consistently unify under the extended survival hypothesis (with minimal fine-tuning): trinification symmetry SU(3)C × SU(3)L × SU(3)R with either LR or CR parity, and SU(6)CR × SU(2)L. Although the successful cases give a large range for proton lifetime estimates, all of them include regions consistent with current experimental bounds and within reach of forthcoming experiments. The scenario investigated in this paper essentially represents the unique (potentially) viable choice in the class of E6 GUTs proceeding through a novel-symmetry intermediate stage, since non-minimal alternatives seem to be intrinsically non-perturbative.

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An extended flipped SU(5) GUT model and the fermion mass hierarchy

Cited by 4 publications

References 42 publications

A minimal supersymmetric E6 unified theory

A minimal supersymmetric E6 unified theory

Flipped SO(10) model

A realistic theory of E6 unification through novel intermediate symmetries

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