Radiatively induced quark and lepton mass model

Nomura, Takaaki; Okada, Hiroshi

doi:10.1016/j.physletb.2016.08.023

Cited by 32 publications

(22 citation statements)

References 100 publications

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“…To provide an explanation of the SM-fermion mass hierarchy, several extensions of the SM with radiative seesaw mechanisms have been constructed in the literature [1][2][3][4][5][6][7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

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Radiatively generated hierarchy of lepton and quark masses

Hernández

Kovalenko

Schmidt

2017

J. High Energ. Phys.

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We propose a model for radiatively generating the hierarchy of the Standard Model (SM) fermion masses: tree-level top quark mass; 1-loop bottom, charm, tau and muon masses; 2-loop masses for the light up, down and strange quarks as well as for the electron; and 4-loop masses for the light active neutrinos. Our model is based on a softlybroken S 3 × Z 2 discrete symmetry. Its scalar sector consists only of one SM Higgs doublet and three electrically neutral SM-singlet scalars. We do not need to invoke either electrically charged scalar fields, or an extra SU 2L scalar doublet, or the spontaneous breaking of the discrete group, which are typical for other radiative models in the literature. The model features a viable scalar dark matter candidate.

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Section: Introductionmentioning

confidence: 99%

“…j3 → tree-level (1.9) 12) where j, k = 1, 2, 3. Since the SM fermion masses appear after the electroweak symmetry breaking, the mass matrices are proportional to the VEV v = φ 0 of the SM Higgs, φ, or v 2 in the case of the neutrinos.…”

Section: Introductionmentioning

confidence: 99%

Radiatively generated hierarchy of lepton and quark masses

Hernández

Kovalenko

Schmidt

2017

J. High Energ. Phys.

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“…The size of the contribution from each scalar would depend on the detail of models. In fact, we can consider many setups to realize the observed quark mass matrix radiatively in the framework of the Grand Unified Theory [3][4][5][6], Left-Right symmetric models [7][8][9], supersymmetric models [10][11][12][13][14][15][16][17][18][19][20][21], and flavor symmetric models [22][23][24][25][26][27][28]. Our main motivations are, however, to find the connection between DM and the quark mixing in the SM and to look for universal predictions of this kind of model.…”

Section: Setupmentioning

confidence: 99%

Hidden sector behind the CKM matrix

Okawa

Omura

2017

Phys. Rev. D

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The small quark mixing, described by the Cabibbo-Kobayashi-Maskawa (CKM) matrix in the Standard Model, may be a clue to reveal new physics around the TeV scale. We consider a simple scenario that extra particles in a hidden sector radiatively mediate the flavor violation to the quark sector around the TeV scale and effectively realize the observed CKM matrix. The lightest particle in the hidden sector, whose contribution to the CKM matrix is expected to be dominant, is a good dark matter (DM) candidate. There are many possible setups to describe this scenario, so that we investigate some universal predictions of this kind of model, focusing on the contribution of DM to the quark mixing and flavor physics. In this scenario, there is an explicit relation between the CKM matrix and flavor violating couplings, such as four-quark couplings, because both are radiatively induced by the particles in the hidden sector. Then, we can explicitly find the DM mass region and the size of Yukawa couplings between the DM and quarks, based on the study of flavor physics and DM physics. In conclusion, we show that DM mass in our scenario is around the TeV scale, and the Yukawa couplings are between O(0.01) and O(1). The spin-independent DM scattering cross section is estimated as O(10 −9 ) [pb]. An extra colored particle is also predicted at the O(10) TeV scale.

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“…The inverse seesaw mechanism requires a left-handed neutral fermions S L in addition to the right-handed ones N R , and provides us more complicated neutrino mass matrix which can make mass hierarchies softer than the other models such as canonical seesaw [46][47][48][49] and provide rich phenomenologies such as unitarity constraints [50,51]. The U (1) R symmetry requires three SM singlet fermions with non-zero U (1) R charge to cancel gauge anomaly [52][53][54][55][56] and forbid unnecessary Yukawa interactions to obtain inverse seesaw mechanism. We then assign A 4 triplet representation to S L and N R , and some relevant Yukawa couplings are written in terms of modular form providing a constrained 1 Some reviews are useful to understand the non-Abelian group and its applications to flavor structure [34][35][36][37][38][39][40][41].…”

Section: Introductionmentioning

confidence: 99%

An inverse seesaw model with $U(1)_R$ gauge symmetry

Nomura

Okada

2018

LHEP

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We discuss an inverse seesaw model based on right-handed fermion specific U (1) gauge symmetry and A 4 -modular symmetry. These symmetries forbid unnecessary terms and restrict structures of Yukawa interactions which are relevant to inverse seesaw mechanism. Then we can obtain some predictions in neutrino sector such as Dirac-CP phase and sum of neutrino mass, which are shown by our numerical analysis. Besides the relation among masses of heavy pseudo-Dirac neutrino can be obtained since it is also restricted by the modular symmetry. We also discuss implications to lepton flavor violation and collider physics in our model. * Electronic address: nomura@kias.re.kr † Electronic address: hiroshi.okada@apctp.org ‡ Electronic address: sudhanwa@iitbhilai.ac.in

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Radiatively induced quark and lepton mass model

Cited by 32 publications

References 100 publications

Radiatively generated hierarchy of lepton and quark masses

Radiatively generated hierarchy of lepton and quark masses

Hidden sector behind the CKM matrix

An inverse seesaw model with $U(1)_R$ gauge symmetry

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