Low scale gravity as the source of neutrino masses?

Berezinsky, V.; Narayan, Mohan; Vissani, Francesco

doi:10.1088/1126-6708/2005/04/009

Cited by 18 publications

(15 citation statements)

References 89 publications

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“…This is a well known fact in BRpV Split Supersymmetry [18]. Nevertheless, it has been noticed that gravity contributions via dimension 5 operators, can generate a solar mass when the operator is suppressed by a reduced Planck mass, as in models with extra dimensions [19]. Following ref.…”

Section: A Neutrinos and Neutralinos In Ssmentioning

confidence: 99%

Nondiagonal charged lepton Yukawa matrix: Effects on neutrino mixing in supersymmetry

2012

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Generally the diagonalization of the mass matrix of the charged leptons is a part of the neutrino U P MN S matrix. However, usually this contribution is ignored by assuming a diagonal mass matrix for charged leptons. In this letter we test this common assumption in the context of neutrino physics.Our analytical and numerical results for two supersymmetric models reveal that such a simplification is not justified. Especially for the solar and reactor mixing angles important modifications are found.

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Section: A Neutrinos and Neutralinos In Ssmentioning

confidence: 99%

Nondiagonal charged lepton Yukawa matrix: Effects on neutrino mixing in supersymmetry

2012

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“…Several papers [8][9][10][11][12]14] discuss contributions of an exact ''blindness'' model, where the part of the neutrino mass matrix coming from gravitational effects can be parameterized in flavor space as…”

Section: The Neutrino Mass Matrix From Low Scale Gravity Effectsmentioning

confidence: 99%

“…Although the standard Planck scale M P ¼ 1:2 Â 10 19 GeV generates a solar mass that is too small to fit the experimental evidence, a lowered Planck scale M f might in principle do the job. However, gravitational interactions are expected to be ''flavor blind,'' and it has been shown that therefore a purely gravitational neutrino sector is also incapable to explain the existence of three different neutrino masses [14].…”

Section: Introductionmentioning

confidence: 99%

Gravity effects on neutrino masses in split supersymmetry

2009

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The mass differences and mixing angles of neutrinos can neither be explained by R-parity violating split supersymmetry nor by flavor blind quantum gravity alone. It is shown that combining both effects leads, within the allowed parameter range, to good agreement with the experimental results. The atmospheric mass is generated by supersymmetry through mixing between neutrinos and neutralinos, while the solar mass is generated by gravity through flavor blind dimension five operators. Maximal atmospheric mixing forces the tangent squared of the solar angle to be equal to 1=2. The scale of the quantum gravity operator is predicted within a 5% error, implying that the reduced Planck scale should lie around the grand unified theory scale. In this way, the model is very predictive and can be tested at future experiments.

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“…The seesaw mechanism provides a qualitative explanation for the smallness of the neutrino masses, but not quantitative, since the Yukawa couplings and the RHN masses are free parameters of the model. It has been conjectured that some RHN masses could be at the Planck scale, from the fact that Planck-scale physics is expected to break all global quantum numbers [6,7]. Regardless of possible theoretical motivations, it is worthwhile from the phenomenological standpoint to entertain this possibility, since the number of free parameters of the model is then somewhat reduced.…”

Section: Introductionmentioning

confidence: 99%

Neutrino parameters in the Planck-scale lepton number breaking scenario with extended scalar sectors

Bonilla,

Herms,

Ibarra

et al. 2020

Preprint

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Two-loop effects on the right-handed neutrino masses can have an impact on the low-energy phenomenology, especially when the right-handed neutrino mass spectrum is very hierarchical at the cut-off scale. In this case, the physical masses of the lighter right-handed neutrinos can be dominated by quantum effects induced by the heavier ones. Further, if the heaviest right-handed neutrino mass is at around the Planck scale, two-loop effects on the right-handed neutrino masses generate, through the seesaw mechanism, an active neutrino mass which is in the ballpark of the experimental values. In this paper we investigate extensions of the Planckscale lepton number breaking scenario by additional Higgs doublets (inert or not). We find that under reasonable assumptions these models lead simultaneously to an overall neutrino mass scale and to a neutrino mass hierarchy in qualitative agreement with observations.

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Low scale gravity as the source of neutrino masses?

Cited by 18 publications

References 89 publications

Nondiagonal charged lepton Yukawa matrix: Effects on neutrino mixing in supersymmetry

Nondiagonal charged lepton Yukawa matrix: Effects on neutrino mixing in supersymmetry

Gravity effects on neutrino masses in split supersymmetry

Neutrino parameters in the Planck-scale lepton number breaking scenario with extended scalar sectors

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