Double beta decay and neutrino mass models

Helo, Juan Carlos; Hirsch, Martin; Ota, Toshihiko; Santos, F. A. Pereira dos

doi:10.1007/jhep05(2015)092

Cited by 40 publications

(43 citation statements)

References 120 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The sterile neutrinos also contribute to the neutrinoless double beta decay amplitude; the parameter space of the effective mass m ββ is larger than in the standard 3ν case. This can be used to probe the existence of a sterile neutrino, but it does not guarantee an observable m ββ due to possible cancellations [110,111]. 1 Besides the decay in Eq.…”

Section: A Theoretical Frameworkmentioning

confidence: 99%

Perspectives for tests of neutrino mass generation at the GeV scale: Experimental reach versus theoretical predictions

Rasmussen¹,

Winter²

2016

Phys. Rev. D

View full text Add to dashboard Cite

We discuss the parameter space reach of future experiments searching for heavy neutral leptons (HNLs). We consider the GeV seesaw model with three HNL generations and focus on two classes of models: generic assumptions (such as random mass matrices or the Casas-Ibarra parametrization) and flavor symmetry-generated models. We demonstrate that the generic approaches lead to comparable parameter space predictions, which tend to be at least partially within the reach of future experiments. On the other hand, specific flavor symmetry models yield more refined predictions, and some of these can be more clearly excluded. We also highlight the importance of measuring the flavor-dependent couplings of the HNLs as a model discriminator, and we clarify the impact of assumptions frequently used in the literature to show the parameter space reach for the active-sterile mixings.

show abstract

Section: A Theoretical Frameworkmentioning

confidence: 99%

Perspectives for tests of neutrino mass generation at the GeV scale: Experimental reach versus theoretical predictions

Rasmussen¹,

Winter²

2016

Phys. Rev. D

View full text Add to dashboard Cite

show abstract

“…For exhaustive lists of references on the LQ phenomenology one can consult reviews on the subject [7][8][9][10] or turn to the numerous studies of specific aspects of the LQ related physics [11][12][13][14][15][16][17]. The one-loop contributions towards neutrino masses that we study have been considered extensively in the literature [1,2,[18][19][20][21][22]. Our intention, in contrast to the existing studies, is to analyse possibilities to have a more fundamental origin of this mechanism and to provide several realistic examples.…”

Section: Introductionmentioning

confidence: 99%

Leptoquark mechanism of neutrino masses within the grand unification framework

2017

View full text Add to dashboard Cite

We demonstrate the viability of the one-loop neutrino mass mechanism within the framework of grand unification when the loop particles comprise scalar leptoquarks (LQs) and quarks of the matching electric charge. This mechanism can be implemented in both supersymmetric and nonsupersymmetric models and requires the presence of at least one LQ pair. The appropriate pairs for the neutrino mass generation via the up-type and down-type quark loops are S 3 -R 2 and S 1, 3 -R 2 , respectively. We consider two distinct regimes for the LQ masses in our analysis. The first regime calls for very heavy LQs in the loop. It can be naturally realized with the S 1, 3 -R 2 scenarios when the LQ masses are roughly between 10 12 and 5 × 10 13 GeV. These lower and upper bounds originate from experimental limits on partial proton decay lifetimes and perturbativity constraints, respectively. Second regime corresponds to the collider accessible LQs in the neutrino mass loop. That option is viable for the S 3 -R 2 scenario in the models of unification that we discuss. If one furthermore assumes the presence of the type II seesaw mechanism there is an additional contribution from the S 3 -R 2 scenario that needs to be taken into account beside the type II see-saw contribution itself. We provide a complete list of renormalizable operators that yield necessary mixing of all aforementioned LQ pairs using the language of SU (5). We furthermore discuss several possible embeddings of this mechanism in SU (5) and SO(10) gauge groups. a

show abstract

“…The model under consideration does not contain any right-handed neutrino, instead it generates neutrino masses at 2-loop order [33]. Since for our purposes the exact numerical fit to neutrino data is not important, we will not discuss the details here.…”

Section: B Scalar Diquarksmentioning

confidence: 99%

LHC dijet constraints on double beta decay

Helo

Hirsch

2015

Phys. Rev. D

Self Cite

View full text Add to dashboard Cite

We use LHC dijet data to derive constraints on neutrinoless double beta decay. Upper limits on cross sections for the production of "exotic" resonances, such as a right-handed W boson or a diquark, can be converted into lower limits on the double beta decay half-life for fixed choices of other parameters. Constraints derived from run-I data are already surprisingly strong and complementary to results from searches using same-sign dileptons plus jets. For the case of the left-right symmetric model, in case no new resonance is found in future runs of the LHC and assuming g L = g R , we estimate a lower limit on the double beta decay half-live larger than 10 27 ys can be derived from future dijet data, except in the window of relatively light right-handed neutrino masses in the range 0.5 MeV to 50 GeV. Part of this mass window will be tested in the upcoming SHiP experiment. We also discuss current and future limits on possible scalar diquark contributions to double beta decay that can be derived from dijet data.

show abstract

Double beta decay and neutrino mass models

Cited by 40 publications

References 120 publications

Perspectives for tests of neutrino mass generation at the GeV scale: Experimental reach versus theoretical predictions

Perspectives for tests of neutrino mass generation at the GeV scale: Experimental reach versus theoretical predictions

Leptoquark mechanism of neutrino masses within the grand unification framework

LHC dijet constraints on double beta decay

Contact Info

Product

Resources

About