Renormalizable SU(5) completions of a Zee-type neutrino mass model

Kumerički, Krešimir; Mede, Timon; Picek, I.

doi:10.1103/physrevd.97.055012

Cited by 14 publications

(6 citation statements)

References 45 publications

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“…Nevertheless, many proposals were made in the literature towards building a viable GUT by extending the GG model; for an incomplete list of realistic models that also incorporate non-zero neutrino masses, see, e.g., Refs. [20,[64][65][66][67][68][69][70][71][72][73][74][75][76][77][78][79][80][81][82][83]. One of the most minimal renormalizable extensions of the GG model was advanced recently in Ref.…”

Section: (Diagram On the Left)mentioning

confidence: 99%

Searches for Baryon Number Violation in Neutrino Experiments: A White Paper

Dev¹,

Koerner²,

Saad³

et al. 2022

Preprint

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Baryon number conservation is not guaranteed by any fundamental symmetry within the Standard Model, and therefore has been a subject of experimental and theoretical scrutiny for decades. So far, no evidence for baryon number violation has been observed. Large underground detectors have long been used for both neutrino detection and searches for baryon number violating processes. The next generation of large neutrino detectors will seek to improve upon the limits set by past and current experiments and will cover a range of lifetimes predicted by several Grand Unified Theories. In this White Paper, we summarize theoretical motivations and experimental aspects of searches for baryon number violation in neutrino experiments.

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Section: (Diagram On the Left)mentioning

confidence: 99%

Searches for Baryon Number Violation in Neutrino Experiments: A White Paper

Dev¹,

Koerner²,

Saad³

et al. 2022

Preprint

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“…(For an extensive sample of the 𝑆𝑈 (5) models to compare this proposal with, see Refs. [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. )…”

Section: Ilja Doršnermentioning

confidence: 99%

The Minimal SU(5) Unification Model

Doršner¹

2022

Proceedings of Corfu Summer Institute 2021 "School and Workshops on Elementary Particle Physics and Gravity" — PoS(CORFU2021)

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I present the most minimal realistic 𝑆𝑈 (5) unification model to date and discuss its main predictions. The particle content of the model comprises 5 𝐻 , 24 𝐻 , 35 𝐻 , 5 𝐹 𝑖 , 10 𝐹 𝑖 , 15 𝐹 , 15 𝐹 , and 24 𝑉 , where subscripts 𝐻, 𝐹, and 𝑉 denote whether a given representation contains scalars, fermions, or gauge bosons, respectively, while 𝑖 = 1, 2, 3. The model employs all possible interaction terms, as allowed by the Lorentz group, the 𝑆𝑈 (5) gauge symmetry, and the aforementioned particle content, to generate the Standard Model fermion masses through three different mechanisms. It also connects the neutrino mass generation mechanism to the experimentally observed mass disparity between the down-type quarks and charged leptons. The minimal structure of the model requires 24 𝐻 and 5 𝐻 not only to break 𝑆𝑈 (5) and 𝑆𝑈 (3) × 𝑆𝑈 (2) × 𝑈 (1) gauge groups, respectively, but to accomplish one additional task each. The model furthermore predicts that neutrinos are strictly Majorana fields, that one neutrino is purely a massless particle, and that neutrino masses are of normal ordering. The current experimental bound on the 𝑝 → 𝜋 0 𝑒 + lifetime limit, in conjunction with the prediction of the model for the gauge mediated proton decays, implies that there are four new scalar multiplets at or below a 120 TeV mass scale if these multiplets are mass degenerate. If these multiplets are not mass degenerate, the quoted limit then applies, for all practical purposes, to the geometric mean of their masses. The scalar multiplets in question transform as (1, 3, 0), (8, 1, 0), (3, 3, −2/3), and (6, 2, 1/6) under the Standard Model gauge group 𝑆𝑈 (3)×𝑆𝑈 ( 2)×𝑈 (1) with calculable couplings to the Standard Model fields.

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“…To the best of our knowledge neither of these models has been discussed in the literature so far. A GUT realization of neutrino masses based on diagrams with the same topology as F8 is discussed in [27]. However, their field contend already allows for the generation of neutrino masses at one-loop without any extension of the fermion sector and, therefore, does not fulfill our minimality conditions.…”

Section: Model Scalar Contentmentioning

confidence: 99%

Radiative neutrino masses and successful SU(5) unification

Klein

Lindner

2019

Phys. Rev. D

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Minimal SU (5) Grand Unified models predict massless neutrinos and struggle to achieve gauge coupling unification compatible with the observed lower limit on the proton lifetime. Both of these issues can be resolved by embedding minimal radiative neutrino mass models into SU (5). We systematically analyze the possible ways to realize radiative neutrino mass generation in SU (5) and provide a list of the minimal models. We find various models that have not been considered in the literature and demonstrate the compatibility of radiative neutrino masses with gauge coupling unification and proton decay for a new class of models with vector-like fermions. I. INTRODUCTIONGrand-Unified-Theories (GUTs) are an attractive extension of the Standard Model (SM) and provide an elegant completion of the SU (3)×SU (2)×U (1) gauge group of the Standard Model (SM). The simplest model for Grand Unification, the original SU (5) model proposed by Georgi and Glashow [1], is known to exhibit a number of issues that seem to prevent a successful description of the world we observe. Among the most important of these are the inability to account for the observed charged fermion masses, the failure to achieve unification of the gauge couplings, rapid proton decay and the prediction of massless neutrinos. In order to address these issues extensions have been proposed which amend the model in various ways [2][3][4][5][6]. For a classic review of Grand Unified Theories see [7], a more recent overview of GUT phenomenology can be found in [8].One of the simplest extensions is a scalar 45-plet. The 45 contains an additional Standard-Model doublet, the interactions of which lead to additional contributions to the fermion masses and allow for the observed patters of the masses [2]. In addition it has been shown that this model also allows for unification at a scale high enough to suppress the proton decay rate below the observed upper limit from Super-Kamiokande [9]. Nevertheless, the problem that neutrinos are predicted to be massless is not solved in this model.Further extensions of the field content are therefore unavoidable. As is well known from analyses of minimal Standard Model extensions neutrino masses can be generated at tree-level by the type-I, II and III seesaw mechanism [10-16]. The required fields, i.e. complete SM-singlet fermions, scalar or fermionic SU (2) L triplets, can be embedded in SU (5) theories. However, it is also possible that the neutrino masses only arise at loop-level, see for example [17][18][19] for early work in this direction and [20] for a recent review of radiative neutrino mass models. Given that the minimal renormalizable SU (5)

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Renormalizable SU(5) completions of a Zee-type neutrino mass model

Cited by 14 publications

References 45 publications

Searches for Baryon Number Violation in Neutrino Experiments: A White Paper

Searches for Baryon Number Violation in Neutrino Experiments: A White Paper

The Minimal SU(5) Unification Model

Radiative neutrino masses and successful SU(5) unification

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