Low scale seesaw, electron electric dipole moment, and leptogenesis in a model with spontaneous<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>C</mml:mi><mml:mi>P</mml:mi></mml:math>violation

Chen, Mu‐Chun; Mahanthappa, K. T.

doi:10.1103/physrevd.75.015001

Cited by 12 publications

(2 citation statements)

References 56 publications

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“…These expressions differ because the diagram for the qEDM involves quarks whereas in the case of the eEDM the loop involves massive neutrinos. The qEDMs d u and d d involve the factor i=d,s,b Im(e −iα m i V ui L V ui * R ) and j=u,c,t Im(e −iα m j V jd L V jd * R ), respectively [69,150,151], while the expression for the electron EDM contains the factor Im(e −iα (M ν D ) ee ) [152,153], where M ν D is the neutrino Dirac-mass matrix. Because the expressions for d q and d e involve different parameters their relative magnitudes cannot be reliably compared in general.…”

Section: The Edms Of Paramagnetic Systemsmentioning

confidence: 99%

Unraveling models of CP violation through electric dipole moments of light nuclei

Dekens

Vries

Bsaisou

et al. 2014

J. High Energ. Phys.

111

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We show that the proposed measurements of the electric dipole moments of light nuclei in storage rings would put strong constraints on models of flavor-diagonal CP violation. Our analysis is exemplified by a comparison of the Standard Model including the QCD theta term, the minimal left-right symmetric model, a specific version of the so-called aligned two-Higgs doublet model, and briefly the minimal supersymmetric extension of the Standard Model. By using effective field theory techniques we demonstrate to what extent measurements of the electric dipole moments of the nucleons, the deuteron, and helion could discriminate between these scenarios. We discuss how measurements of electric dipole moments of other systems relate to the light-nuclear measurements.

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Section: The Edms Of Paramagnetic Systemsmentioning

confidence: 99%

Unraveling models of CP violation through electric dipole moments of light nuclei

Dekens

Vries

Bsaisou

et al. 2014

J. High Energ. Phys.

111

View full text Add to dashboard Cite

show abstract

“…This means that there are no tree-level contributions and the eEDM is generated at loop level. The generated eEDM is given by [59,60]…”

Section: The Electron Edmmentioning

confidence: 99%

Viability of minimal left–right models with discrete symmetries

Dekens

Boer

2014

Nuclear Physics B

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We provide a systematic study of minimal left-right models that are invariant under P , C, and/or CP transformations. Due to the high amount of symmetry such models are quite predictive in the amount and pattern of CP violation they can produce or accommodate at lower energies. Using current experimental constraints some of the models can already be excluded. For this purpose we provide an overview of the experimental constraints on the different left-right symmetric models, considering bounds from colliders, meson-mixing and low-energy observables, such as beta decay and electric dipole moments. The features of the various Yukawa and Higgs sectors are discussed in detail. In particular, we give the Higgs potentials for each case, discuss the possible vacua and investigate the amount of fine-tuning present in these potentials. It turns out that all left-right models with P , C, and/or CP symmetry have a high degree of fine-tuning, unless supplemented with mechanisms to suppress certain parameters. The models that are symmetric under both P and C are not in accordance with present observations, whereas the models with either P , C, or CP symmetry cannot be excluded by data yet. To further constrain and discriminate between the models measurements of B-meson observables at LHCb and B-factories will be especially important, while measurements of the EDMs of light nuclei in particular could provide complementary tests of the LRMs.

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Neutrino Mass Models: circa 2008

Chen

Mahanthappa

2009

Nuclear Physics B - Proceedings Supplements

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We review recent developments in theoretical models for neutrino masses and mixing. Emphases are given to models based on finite group family symmetries. In particular, we describe one recent model based on SU (5), in which both the tri-bimaximal neutrino mixing and realistic CKM matrix are generated. We also discuss two models based on a non-anomalous U (1)F family symmetry in which the gauge anomalies are cancelled due to the presence of the right-handed neutrinos. In one of these models, the seesaw scale can be as low as a TeV; in the other model, which is based on SUSY SU (5), the U (1)F symmetry forbids Higgs-mediated proton decays.

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Low scale seesaw, electron electric dipole moment, and leptogenesis in a model with spontaneousCPviolation

Cited by 12 publications

References 56 publications

Unraveling models of CP violation through electric dipole moments of light nuclei

Unraveling models of CP violation through electric dipole moments of light nuclei

Viability of minimal left–right models with discrete symmetries

Neutrino Mass Models: circa 2008

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