Beyond the standard seesaw: neutrino masses from Kähler operators and broken supersymmetry

Brignole, Andrea; Joaquim, F. R.; Rossi, Anna Maria

doi:10.1007/jhep08(2010)133

Cited by 16 publications

(11 citation statements)

References 146 publications

(250 reference statements)

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“…This mechanism for neutrino mass generation does not work in our model because of the extremely suppressed Yukawa coupling y N . However in the context of supersymmetric models, various alternatives to the conventional see-saw mechanism have been conjectured to originate from different non-renormalizable Kähler operators present in the theory [47,49,[55][56][57]. In our model, the dominant source of neutrino masses arises from the following non-renormalizable Kähler operator present in the theory (see Eq.…”

Section: Neutrino Massesmentioning

confidence: 91%

PeV scale supersymmetry breaking and the IceCube neutrino flux

Dhuria¹,

Rentala²

2018

J. High Energ. Phys.

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The observation of very high energy neutrino events at IceCube has grasped a lot of attention in the fields of both astrophysics and particle physics. It has been speculated that these high energy neutrinos might originate either from purely conventional astrophysical sources or from the late decay of a super heavy (PeV scale) dark matter (DM) particle. In order for decaying DM to be a dominant source of the IceCube high-energy neutrinos, it would require an unusually suppressed value of the coupling of DM to neutrinos. We attempt to explain this small coupling in the context of an R-parity conserving minimal supergravity model which has right-handed neutrino superfields. With the main assumptions of super-partner masses at the PeV scale and also a reheating temperature not much larger than the PeV scale, we find in our model several natural order-of-magnitude "miracles", (i) the gravitino is produced via freeze-in as a DM candidate with the correct relic density (ii) the right-handed (RH) sneutrino makes up only a tiny fraction (10 −6 ), of the present day energy density of the universe, yet its decay lifetime to the gravitino and neutrinos is such that it naturally predicts the right order-of-magnitude for the IceCube neutrino flux. The long lifetime of the RH sneutrino is explained by the existence of a global R-symmetry which is only broken due to supersymmetry breaking effects. Our model also predicts a flux of 100 TeV gamma rays from the decaying RH sneutrino which are within the current observational constraints.

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Section: Neutrino Massesmentioning

confidence: 91%

PeV scale supersymmetry breaking and the IceCube neutrino flux

Dhuria¹,

Rentala²

2018

J. High Energ. Phys.

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“…A measurement of Br(µ → eγ) fixes a combination of soft masses are not possible. Moreover, when LFV in the soft masses is generated by Y T only, the large value of sin θ 13 provided by the latest global analysis of neutrino oscillation data together with the present MEG bound on µ → eγ set an upper limit on the radiative τ decays τ → µ(e)γ which is out of the reach of future experiments [78,82,118,[128][129][130].…”

Section: Resultsmentioning

confidence: 93%

Constrained SUSY seesaws with a 125 GeV Higgs

Hirsch

Joaquim²,

Vicente

2012

J. High Energ. Phys.

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Motivated by the ATLAS and CMS discovery of a Higgs-like boson with a mass around 125 GeV, and by the need of explaining neutrino masses, we analyse the three canonical SUSY versions of the seesaw mechanism (type I, II and III) with CMSSM boundary conditions. In type II and III cases, SUSY particles are lighter than in the CMSSM (or the constrained type I seesaw), for the same set of input parameters at the universality scale. Thus, to explain m h 0 ≃ 125 GeV at low energies, one is forced into regions of parameter space with very large values of m 0 , M 1/2 or A 0 . We compare the squark and gluino masses allowed by the ATLAS and CMS ranges for m h 0 (extracted from the 2011-2012 data), and discuss the possibility of distinguishing seesaw models in view of future results on SUSY searches. In particular, we briefly comment on the discovery potential of LHC upgrades, for squark/gluino mass ranges required by present Higgs mass constraints. A discrimination between different seesaw models cannot rely on the Higgs mass data alone, therefore we also take into account the MEG upper limit on BR(µ → eγ) and show that, in some cases, this may help to restrict the SUSY parameter space, as well as to set complementary limits on the seesaw scale.

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“…The other two seesaw variants have received much less attention. The LFV phenomenology of the SUSY type-II seesaw has been considered in [60,[76][77][78][79][80][81], whereas the SUSY type-III seesaw has been studied in [82][83][84]. More recently, the interplay between the Higgs mass constraint and LFV was studied in [62] for the three seesaw variants.…”

Section: Standard High-scale Seesaw Scenariosmentioning

confidence: 99%

Lepton Flavor Violation beyond the MSSM

Vicente

2015

Advances in High Energy Physics

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Most extensions of the Standard Model lepton sector predict large lepton flavor violating rates. Given the promising experimental perspectives for lepton flavor violation in the next few years, this generic expectation might offer a powerful indirect probe to look for new physics. In this review we will cover several aspects of lepton flavor violation in supersymmetric models beyond the Minimal Supersymmetric Standard Model. In particular, we will concentrate on three different scenarios: high-scale and low-scale seesaw models as well as models with R-parity violation. We will see that in some cases the LFV phenomenology can have characteristic features for specific scenarios, implying that dedicated studies must be performed in order to correctly understand the phenomenology in non-minimal supersymmetric models.

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Beyond the standard seesaw: neutrino masses from Kähler operators and broken supersymmetry

Cited by 16 publications

References 146 publications

PeV scale supersymmetry breaking and the IceCube neutrino flux

PeV scale supersymmetry breaking and the IceCube neutrino flux

Constrained SUSY seesaws with a 125 GeV Higgs

Lepton Flavor Violation beyond the MSSM

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