LIMITS ON THE ELECTROMAGNETIC AND WEAK DIPOLE MOMENTS OF THE TAU-LEPTON IN E<sub>6</sub> SUPERSTRING MODELS

Gutiérrez‐Rodríguez, A.; Hernández‐Ruíz, M. A.; Pérez, M. A.

doi:10.1142/s0217751x07036865

Cited by 35 publications

(31 citation statements)

References 68 publications

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“…An important feature of E 6 inspired SUSY models is that the mass of the lightest Higgs particle can be substantially larger in these scenarios than in the MSSM and NMSSM [24]. Previously, the implications of E 6 inspired SUSY models with an additional Uð1Þ 0 gauge symmetry have been studied for EWSB [21][22][23][24], neutrino physics [25,26], leptogenesis [27,28], EW baryogenesis [29], muon anomalous magnetic moment [30], electric dipole moment of electron [31] and tau lepton [32], lepton flavor violating processes like ! e [33] and CP violation in the Higgs sector [34].…”

Section: Introductionmentioning

confidence: 99%

Constrained exceptional supersymmetric standard model

et al. 2009

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We propose and study a constrained version of the exceptional supersymmetric standard model (E 6 SSM), which we call the cE 6 SSM, based on a universal high energy scalar mass m 0 , trilinear scalar coupling A 0 and gaugino mass M 1=2 . We derive the renormalization group (RG) Equations for the cE 6 SSM, including the extra Uð1Þ N gauge factor and the low-energy matter content involving three 27 representations of E 6 . We perform a numerical RG analysis for the cE 6 SSM, imposing the usual lowenergy experimental constraints and successful electroweak symmetry breaking. Our analysis reveals that the sparticle spectrum of the cE 6 SSM involves a light gluino, two light neutralinos, and a light chargino. Furthermore, although the squarks, sleptons, and Z 0 boson are typically heavy, the exotic quarks and squarks can also be relatively light. We finally specify a set of benchmark points, which correspond to particle spectra, production modes, and decay patterns peculiar to the cE 6 SSM, altogether leading to spectacular new physics signals at the Large Hadron Collider.

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Section: Introductionmentioning

confidence: 99%

Constrained exceptional supersymmetric standard model

et al. 2009

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“…Recently, the latest Tevatron and early LHC Z ′ mass limits in these models have been discussed in [9] while different aspects of phenomenology of exotic quarks and squarks have been considered in [10]. Also the implications of the E 6 inspired SUSY models have been studied for EW symmetry breaking (EWSB) [11]- [14], neutrino physics [15]- [16], leptogenesis [17]- [18], EW baryogenesis [19], muon anomalous magnetic moment [20], electric dipole moment of electron [21] and tau lepton [22], lepton flavour violating processes like µ → eγ [23] and CP-violation in the Higgs sector [24]. The neutralino sector in E 6 inspired SUSY models was analysed previously in [13], [21]- [23], [25]- [29].…”

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confidence: 99%

E6inspired supersymmetric models with exact custodial symmetry

Nevzorov

2013

Phys. Rev. D

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The breakdown of E 6 gauge symmetry at high energies may lead to supersymmetric (SUSY) models based on the Standard Model (SM) gauge group together with extra U (1) ψ and U (1) χ gauge symmetries. To ensure anomaly cancellation the particle content of these E 6 inspired models involves extra exotic states that generically give rise to non-diagonal flavour transitions and rapid proton decay. We argue that a single discreteZ H 2 symmetry can be used to forbid tree-level flavor-changing transitions, as well as the most dangerous baryon and lepton number violating operators.We present 5D and 6D orbifold GUT constructions that lead to the E 6 inspired SUSY models of this type. The breakdown of U (1) ψ and U (1) χ gauge symmetries that preserves E 6 matter parity assignment guarantees that ordinary quarks and leptons and their superpartners, as well as the exotic states which originate from 27 representations of E 6 survive to low energies. These E 6 inspired models contain two dark-matter candidates and must also include additional TeV scale vectorlike lepton or vectorlike down type quark states to render the lightest exotic quark unstable. We examine gauge coupling unification in these models and discuss their implications for collider phenomenology and cosmology.

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“…Previously, the implications of E 6 inspired SUSY models with an additional U(1) gauge symmetry have been studied for electroweak symmetry breaking (EWSB) [31][32][33][34][35][36][37], neutrino physics [38,39], leptogenesis [40,41], electroweak (EW) baryogenesis [42,43], the muon anomalous magnetic moment [44,45], the electric dipole moment of the electron [46] and of the tau lepton [47], for lepton flavor violating processes like µ → eγ [48] and for CP-violation in the Higgs sector [49]. The neutralino sector in E 6 inspired SUSY models was analysed in [36,[46][47][48][50][51][52][53][54][55][56][57]. Such models have also been proposed as the solution to the tachyon problems of anomaly-mediated SUSY breaking, via U(1) D-term contributions [58], and have been used in combination with a generation symmetry to construct a model explaining the fermion mass hierarchy and mixing [59].…”

Section: Jhep01(2015)153mentioning

confidence: 99%

Non-standard higgs decays in U(1) extensions of the MSSM

Athron

Mühlleitner

Nevzorov

et al. 2015

J. High Energ. Phys.

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In U(1) extensions of the Minimal Supersymmetric extension of the Standard Model there is a simple mechanism that leads to a heavy Z boson with a mass which is substantially larger than the supersymmetry breaking scale. This mechanism may also result in a pseudoscalar state that is light enough for decays of the 125 GeV Standard Model-like Higgs boson into a pair of such pseudoscalars to be kinematically allowed. We study these decays within E 6 inspired supersymmetric models with an exact custodial symmetry that forbids tree-level flavor-changing transitions and the most dangerous baryon and lepton number violating operators. We argue that the branching ratio of the lightest Higgs boson decays into a pair of the light pseudoscalar states may not be negligibly small.

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LIMITS ON THE ELECTROMAGNETIC AND WEAK DIPOLE MOMENTS OF THE TAU-LEPTON IN E₆ SUPERSTRING MODELS

Cited by 35 publications

References 68 publications

Constrained exceptional supersymmetric standard model

Constrained exceptional supersymmetric standard model

E6inspired supersymmetric models with exact custodial symmetry

Non-standard higgs decays in U(1) extensions of the MSSM

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LIMITS ON THE ELECTROMAGNETIC AND WEAK DIPOLE MOMENTS OF THE TAU-LEPTON IN E6 SUPERSTRING MODELS

Cited by 35 publications

References 68 publications

Constrained exceptional supersymmetric standard model

Constrained exceptional supersymmetric standard model

E6inspired supersymmetric models with exact custodial symmetry

Non-standard higgs decays in U(1) extensions of the MSSM

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Product

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LIMITS ON THE ELECTROMAGNETIC AND WEAK DIPOLE MOMENTS OF THE TAU-LEPTON IN E₆ SUPERSTRING MODELS