Lepton number as the fourth “color”

Pati, Jogesh C.; Salam, Abdus

doi:10.1142/9789812795915_0042

Cited by 401 publications

(699 citation statements)

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“…figure 1). At O i , only SUSY is broken, whereas at the other fixed points, O ps , O gg and O fl , also SO(10) is broken to its three GUT subgroups G ps = SU(4) × SU(2) × SU(2) [1], G gg = SU(5) × U(1) X [2] and flipped SU(5) [5,6], G fl = SU(5) × U(1) , respectively. The intersection of all these GUT groups yields the standard model group with an additional U(1) factor, G sm = SU(3) × SU(2) × U(1) Y × U(1) Y , as unbroken gauge symmetry below the compactification scale.…”

Section: D Orbifold Gut Modelmentioning

confidence: 99%

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Flavour Structure and Proton Decay in 6D Orbifold GUTs

Buchmüller

Covi

Emmanuel-Costa³

et al. 2004

J. High Energy Phys.

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We study proton decay in a supersymmetric SO(10) gauge theory in six dimensions compactified on an orbifold. The dimension-5 proton decay operators are forbidden by R-symmetry, whereas the dimension-6 operators are enhanced due to the presence of KK towers. Three sequential quark-lepton families are localised at the three orbifold fixed points, where SO(10) is broken to its three GUT subgroups. The physical quarks and leptons are mixtures of these brane states and additional bulk zero modes. This leads to a characteristic pattern of branching ratios in proton decay, in particular the suppression of the p → µ + K 0 mode.

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Section: D Orbifold Gut Modelmentioning

confidence: 99%

“…The most striking consequence of Grand Unified Theories is proton decay [1]- [6]. It has been predicted and sought for more than 30 years, and its absence constitutes a very strong constraint on any realistic GUT model.…”

Section: Introductionmentioning

confidence: 99%

Flavour Structure and Proton Decay in 6D Orbifold GUTs

Buchmüller

Covi

Emmanuel-Costa³

et al. 2004

J. High Energy Phys.

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“…We show this in figure 2 setting m W R = 1.9 TeV. It is found that the Z R mass is relatively small; in particular, m Z R can be much smaller than that predicted in the minimal left-right symmetric model with a single SU(2) R triplet Higgs field [74][75][76][77], which is reproduced if one takes v 15 R = 0. This distinguishing feature can be tested at the LHC.…”

Section: Jhep02(2016)120mentioning

confidence: 78%

“…Importantly, the (1, 1, 1) component of the 210 breaks D-parity [69][70][71][72][73] at the GUT scale, and thus the low-energy effective theory does not exhibit a left-right symmetry [74][75][76][77]. Finally, this gauge group is broken to the SM gauge symmetries at the TeV scale by the (1, 1, 3, +2) component of a 126.…”

Section: Jhep02(2016)120mentioning

confidence: 99%

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The ATLAS diboson resonance in non-supersymmetric SO(10)

Evans

Olive

Zheng

2016

J. High Energ. Phys.

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SO(10) grand unification accommodates intermediate gauge symmetries with which gauge coupling unification can be realized without supersymmetry. In this paper, we discuss the possibility that a new massive gauge boson associated with an intermediate gauge symmetry explains the excess observed in the diboson resonance search recently reported by the ATLAS experiment. The model we find has two intermediate symmetries,where the latter gauge group is broken at the TeV scale. This model achieves gauge coupling unification with a unification scale sufficiently high to avoid proton decay. In addition, this model provides a good dark matter candidates, whose stability is guaranteed by a Z 2 symmetry present after the spontaneous breaking of the intermediate gauge symmetries. We also discuss prospects for testing these models in the forthcoming LHC experiments and dark matter detection experiments.

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Grand symmetry, spectral action and the Higgs mass

Devastato

Lizzi

Martinetti

2014

J. High Energ. Phys.

113

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In the context of the spectral action and the noncommutative geometry approach to the standard model, we build a model based on a larger symmetry. With this grand symmetry it is natural to have the scalar field necessary to obtain the Higgs mass in the vicinity of 126 GeV. This larger symmetry mixes gauge and spin degrees of freedom without introducing extra fermions. Requiring the noncommutative space to be an almost commutative geometry (i.e. the product of manifold by a finite dimensional internal space) gives conditions for the breaking of this grand symmetry to the standard model.

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Lepton number as the fourth “color”

Cited by 401 publications

References 0 publications

Flavour Structure and Proton Decay in 6D Orbifold GUTs

Flavour Structure and Proton Decay in 6D Orbifold GUTs

The ATLAS diboson resonance in non-supersymmetric SO(10)

Grand symmetry, spectral action and the Higgs mass

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