Viable low-scale model with universal and inverse seesaw mechanisms

Hernández, A. E. Cárcamo; González, Juan Marchant; Saldaña-Salazar, U. J.

doi:10.1103/physrevd.100.035024

Cited by 15 publications

(4 citation statements)

References 71 publications

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“…Depending on the discrete symmetries assignments one can have, for instance sizeable τ → eγ decay, but strongly suppressed µ → eγ and τ → µγ processes as shown in the A 4 flavor model of Ref. [98]. Figure 3 shows the correlations of the Branching ratio for the µ → eγ decay with the leptonic mixing angles as well as with the leptonic Dirac CP violating phase.…”

Section: Charged Lepton Flavor Violating Decaysmentioning

confidence: 98%

Littlest inverse seesaw model

Hernández

King

2020

Nuclear Physics B

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We propose a minimal predictive inverse seesaw model based on two right-handed neutrinos and two additional singlets, leading to the same low energy neutrino mass matrix as in the Littlest Seesaw (LS) (type I) model. In order to implement such a Littlest Inverse Seesaw (LIS) model, we have used an S4 family symmetry, together with other various symmetries, flavons and driving fields. The resulting LIS model leads to an excellent fit to the low energy neutrino parameters, including the prediction of a normal neutrino mass ordering, exactly as in the usual LS model. However, unlike the LS model, the LIS model allows charged lepton flavour violating (CLFV) processes and lepton conversion in nuclei within reach of the forthcoming experiments.

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Section: Charged Lepton Flavor Violating Decaysmentioning

confidence: 98%

Littlest inverse seesaw model

Hernández

King

2020

Nuclear Physics B

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“…In this simplified benchmark scenario, the complex phase responsible for CP violation in neutrino oscillation arises from the spontaneous breaking of the A 4 discrete group. This mechanism for inducing CP violation in the fermion sector via the spontaneous breaking of discrete groups is the so-called geometrical CP violation [46,75,76,[91][92][93][94][95][96][97].…”

Section: Neutrino Masses and Mixingsmentioning

confidence: 99%

“…Given the low mass scale of the right-handed neutrinos, this model can be classified as a low scale type I seesaw, as it has been coined in the literature [52][53][54][55][56][57][58][59][60][61][62]. There are different realizations of low scale seesaw models, as for example inverse or linear [35,46,[63][64][65][66][67][68][69][70][71][72][73][74][75][76][77][78], where an additional lepton number violating mass parameter is added.…”

Section: Introductionmentioning

confidence: 99%

Low scale type I seesaw model for lepton masses and mixings

2020

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In contrast to the original type I seesaw mechanism that requires right-handed Majorana neutrinos at energies much higher than the electroweak scale, the so-called low scale seesaw models allow lighter masses for the additional neutrinos. Here we propose an alternative low scale type I seesaw model, where neither linear nor inverse seesaw mechanisms take place, but the spontaneous breaking of a discrete symmetry at an energy scale much lower than the model cutoff is responsible for the smallness of the light active neutrino masses. In this scenario, the model is defined with minimal particle content, where the righthanded Majorana neutrinos can have masses at the ∼50 GeV scale. The model is predictive in the neutrino sector having only four effective parameters that allow to successfully reproduce the experimental values of the six low energy neutrino observables.

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“…: V,-vol rections, lacks of a more fundamental motivation. Possible explanations for the origin of these parameters, in particular the small Majorana mass term in the ISS construction, have been proposed in several models [36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54].…”

Section: Introductionmentioning

confidence: 99%

Gauged inverse seesaw from dark matter

et al. 2021

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We propose an economical model addressing the generation of the Inverse Seesaw mechanism from the spontaneous breaking of a local $$U(1)_{B-L}$$ U ( 1 ) B - L , with the Majorana masses of the sterile neutrinos radiatively generated from the dark sector. The field content of the Standard Model is extended by neutral scalars and fermionic singlets, and the gauge group is extended with a $$U(1)_{B-L}$$ U ( 1 ) B - L and a discrete $${\mathbb {Z}}_4$$ Z 4 symmetries. Besides dynamically generating the Inverse Seesaw and thus small masses to the active neutrinos, our model offers two possible dark matter candidates, one scalar and one fermionic, stable thanks to a remnant $${\mathbb {Z}}_2$$ Z 2 symmetry. Our model complies with bounds and constraints form dark matter direct detection, invisible Higgs decays and $$Z'$$ Z ′ collider searches for masses of the dark sector at the TeV scale.

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Viable low-scale model with universal and inverse seesaw mechanisms

Cited by 15 publications

References 71 publications

Littlest inverse seesaw model

Littlest inverse seesaw model

Low scale type I seesaw model for lepton masses and mixings

Gauged inverse seesaw from dark matter

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