Predictive model of radiative neutrino masses

Babu, K. S.; Julio, J.

doi:10.1103/physrevd.89.053004

Cited by 22 publications

(30 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…For a variant of the Zee-Wolfenstein model with a family-dependent Z 4 symmetry which is consistent with neutrino oscillation data, see Ref. [80].…”

Section: Neutrino Massmentioning

confidence: 61%

Non-standard interactions in radiative neutrino mass models

Babu

Dev

Jana

et al. 2020

J. High Energ. Phys.

133

126

View full text Add to dashboard Cite

Models of radiative Majorana neutrino masses require new scalars and/or fermions to induce lepton number violating interactions. We show that these new particles also generate observable neutrino nonstandard interactions (NSI) with matter. We classify radiative models as type-I or II, with type-I models containing at least one Standard Model (SM) particle inside the loop diagram generating neutrino mass, and type-II models having no SM particle inside the loop. While type-II radiative models do not generate NSI at tree-level, popular models which fall under the type-I category are shown, somewhat surprisingly, to generate observable NSI at tree-level, while being consistent with direct and indirect constraints from colliders, electroweak precision data and charged-lepton flavor violation (cLFV). We survey such models where neutrino masses arise at one, two and three loops. In the prototypical Zee model which generates neutrino masses via one-loop diagrams involving charged scalars, we find that diagonal NSI can be as large as (8%, 3.8%, 9.3%) for (ε ee , ε µµ , ε τ τ ), while off-diagonal NSI can be at most (1.5 × 10 −3 %, 0.56%, 0.34%) for (ε eµ , ε eτ , ε µτ ). In one-loop neutrino mass models using leptoquarks (LQs), (ε µµ , ε τ τ ) can be as large as (21.6%, 51.7%), while ε ee and (ε eµ , ε eτ , ε µτ ) can at most be 0.6%. Other twoand three-loop LQ models are found to give NSI of similar strength. The most stringent constraints on the diagonal NSI are found to come from neutrino oscillation and scattering experiments, while the off-diagonal NSI are mostly constrained by low-energy processes, such as atomic parity violation and cLFV. We also comment on the future sensitivity of these radiative models in long-baseline neutrino experiments, such as DUNE. While our analysis is focused on radiative neutrino mass models, it essentially covers all NSI possibilities with heavy mediators. arXiv:1907.09498v2 [hep-ph] 3 Oct 2019 Contents 7 Other type-I radiative models 76 7.1 One-loop models 77 7.1.1 Minimal radiative inverse seesaw model 77 7.1.2 One-loop model with vectorlike leptons 80 7.1.3 SU (2) L -singlet leptoquark model with vectorlike quark 82 7.1.4 SU (2) L -doublet leptoquark model with vectorlike quark 83 7.1.5 Model with SU (2) L -triplet leptoquark and vectorlike quark 84 7.1.6 A new extended one-loop leptoquark model 85 7.2 Two-loop models 87 7.2.1 Zee-Babu model 87 7.2.2 Leptoquark/diquark variant of the Zee-Babu model 88 7.2.3 Model with SU (2) L -doublet and singlet leptoquarks 89 7.2.4 Leptoquark model with SU (2) L -singlet vectorlike quark 90 7.2.5 Angelic model 91 7.2.6 Model with singlet scalar and vectorlike quark 92 7.2.7 Leptoquark model with vectorlike lepton 93 7.2.8 Leptoquark model with SU (2) L -doublet vectorlike quark 93 7.2.9 A new two-loop leptoquark model 94 7.3 Three-loop models 95 7.3.1 KNT Model 95 7.3.2 AKS model 96 7.3.3 Cocktail Model 97 7.3.4 Leptoquark variant of the KNT model 98 -ii -7.3.5 SU (2) L -singlet three-loop model 99 7.4 Four-and higher-loop models 100 8 Type II r...

show abstract

“…For a variant of the Zee-Wolfenstein model with a family-dependent Z 4 symmetry which is consistent with neutrino oscillation data, see Ref. [80].…”

Section: Neutrino Massmentioning

confidence: 61%

Non-standard interactions in radiative neutrino mass models

Babu

Dev

Jana

et al. 2020

J. High Energ. Phys.

133

126

View full text Add to dashboard Cite

show abstract

“…The minimal Zee-Wolfenstein model [105] with a Z 2 symmetry to forbid tree-level FCNCs has been excluded by neutrino oscillation data [156,157], while the general version with both Higgs doublets coupling to the leptons is allowed [91,158]. Imposing a Z 4 symmetry [159] allows to explain neutrino data and forbid tree-level FCNCs in the quark sector. Previously in Ref.…”

Section: T1-iimentioning

confidence: 99%

From the Trees to the Forest: A Review of Radiative Neutrino Mass Models

et al. 2017

View full text Add to dashboard Cite

A plausible explanation for the lightness of neutrino masses is that neutrinos are massless at tree level, with their mass (typically Majorana) being generated radiatively at one or more loops. The new couplings, together with the suppression coming from the loop factors, imply that the new degrees of freedom cannot be too heavy (they are typically at the TeV scale). Therefore, in these models there are no large mass hierarchies and they can be tested using different searches, making their detailed phenomenological study very appealing. In particular, the new particles can be searched for at colliders and generically induce signals in lepton-flavor and lepton-number violating processes (in the case of Majorana neutrinos), which are not independent from reproducing correctly the neutrino masses and mixings. The main focus of the review is on Majorana neutrinos. We order the allowed theory space from three different perspectives: (i) using an effective operator approach to lepton number violation, (ii) by the number of loops at which the Weinberg operator is generated, (iii) within a given loop order, by the possible irreducible topologies. We also discuss in more detail some popular radiative models which involve qualitatively different features, revisiting their most important phenomenological implications. Finally, we list some promising avenues to pursue.

show abstract

“…Another interesting class of neutrino mass models uses the radiative mechanism which, unlike the tree-level seesaw models, can go beyond the effective dimension-5 operator and generate tiny neutrino masses at an arbitrary loop-level. Some of the simplest and predictive radiative seesaw models are given in [33][34][35][36][37][38][39][40][41][42][43]. In supersymmetric theories, there exists yet another possibility of generating non-zero neutrino masses without the need of a seesaw mechanism.…”

Section: Introductionmentioning

confidence: 99%

Neutrinos and collider physics

2015

View full text Add to dashboard Cite

We review the collider phenomenology of neutrino physics and the synergetic aspects at energy, intensity and cosmic frontiers to test the new physics behind the neutrino mass mechanism. In particular, we focus on seesaw models within the minimal setup as well as with extended gauge and/or Higgs sectors, and on supersymmetric neutrino mass models with seesaw mechanism and with Rparity violation. In the simplest type-I seesaw scenario with sterile neutrinos, we summarize and update the current experimental constraints on the sterile neutrino mass and its mixing with the active neutrinos. We also discuss the future experimental prospects of testing the seesaw mechanism at colliders and in related low-energy searches for rare processes, such as lepton flavor violation and neutrinoless double beta decay. The implications of the discovery of lepton number violation at the Large Hadron Collider for leptogenesis are also studied.

show abstract

Predictive model of radiative neutrino masses

Cited by 22 publications

References 38 publications

Non-standard interactions in radiative neutrino mass models

Non-standard interactions in radiative neutrino mass models

From the Trees to the Forest: A Review of Radiative Neutrino Mass Models

Neutrinos and collider physics

Contact Info

Product

Resources

About