Inflation due to a nonminimal coupling of singlet scalars in the radiative seesaw model

Budhi, Romy H. S.; Kashiwase, Shoichi; Suematsu, Daijiro

doi:10.1103/physrevd.93.013022

Cited by 13 publications

(8 citation statements)

References 86 publications

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“…Therefore, we only have the competing effects of Y ii 's and λ Hσ , which tend to drive λ σ in opposite directions. Using (71) and assuming that the Yukawas run slowly, we can easily estimate the minimum value of i Y 4 ii that would make the one-loop corrections to λ σ at inflationary field values (say, µ ∼ 30 M P ) comparable to its upper bound of 10 −9 , see (67). This condition is simply…”

Section: Stability In the Singlet Direction And Its Interplay With Lementioning

confidence: 99%

“…The (apparent) stability in the Higgs direction in the SM can be improved in the presence of an additional scalar [18,19], such as the σ field in SMASH. Aside from the obvious positive contribution of the Higgs portal coupling λ Hσ to the beta functions of the Higgs quartic coupling, 21 which is analogous to (71), there is a more powerful effect that occurs if the additional scalar is heavy and acquires a large VEV. In this situation, the SM has to be understood as a low energy effective theory arising when the heavy field is integrated out.…”

Section: Stability In the Higgs Direction: Threshold Mechanismmentioning

confidence: 99%

“…Some parts of our SMASH model have been considered separately, e.g. the possible relation between the seesaw mechanism and either the axion [29,[50][51][52][53][54][55][56][57][58][59][60][61][62][63][64][65][66][67][68], or Higgs (Hidden Scalar) Inflation [69][70][71]. A relation between the latter and scalar [72][73][74][75] or fermionic [76] WIMP dark matter (plus right-handed (RH) neutrinos [77,78]) or axion dark matter [79] has also been studied.…”

Section: Introductionmentioning

confidence: 99%

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Standard Model—axion—seesaw—Higgs portal inflation. Five problems of particle physics and cosmology solved in one stroke

Ballesteros

Redondo

Ringwald³

et al. 2017

J. Cosmol. Astropart. Phys.

209

309

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We present a minimal extension of the Standard Model (SM) providing a consistent picture of particle physics from the electroweak scale to the Planck scale and of cosmology from inflation until today. Three right-handed neutrinos N i , a new color triplet Q and a complex SM-singlet scalar σ, whose vacuum expectation value v σ ∼ 10 11 GeV breaks lepton number and a Peccei-Quinn symmetry simultaneously, are added to the SM. At low energies, the model reduces to the SM, augmented by seesaw generated neutrino masses and mixing, plus the axion. The latter solves the strong CP problem and accounts for the cold dark matter in the Universe. The inflaton is comprised by a mixture of σ and the SM Higgs, and reheating of the Universe after inflation proceeds via the Higgs portal. Baryogenesis occurs via thermal leptogenesis. Thus, five fundamental problems of particle physics and cosmology are solved at one stroke in this unified Standard Model -Axion -seesawHiggs portal inflation (SMASH) model. It can be probed decisively by upcoming cosmic microwave background and axion dark matter experiments.

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Section: Stability In the Singlet Direction And Its Interplay With Lementioning

confidence: 99%

Section: Stability In the Higgs Direction: Threshold Mechanismmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Standard Model—axion—seesaw—Higgs portal inflation. Five problems of particle physics and cosmology solved in one stroke

Ballesteros

Redondo

Ringwald³

et al. 2017

J. Cosmol. Astropart. Phys.

209

309

View full text Add to dashboard Cite

show abstract

“…In several previous articles [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36], we have studied these problems in this model and its extena e-mail: shoichi@hep.s.kanazawa-u.ac.jp b e-mail: suematsu@hep.s.kanazawa-u.ac.jp sions. They suggest that these problems could be explained in a consistent way, simultaneously.…”

Section: Introductionmentioning

confidence: 99%

Radiative neutrino mass model with degenerate right-handed neutrinos

Kashiwase

Suematsu

2016

Eur. Phys. J. C

Self Cite

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The radiative neutrino mass model can relate neutrino masses and dark matter at a TeV scale. If we apply this model to thermal leptogenesis, we need to consider resonant leptogenesis at that scale. It requires both finely degenerate masses for the right-handed neutrinos and a tiny neutrino Yukawa coupling. We propose an extension of the model with a U (1) gauge symmetry, in which these conditions are shown to be simultaneously realized through a TeV scale symmetry breaking. Moreover, this extension can bring about a small quartic scalar coupling between the Higgs doublet scalar and an inert doublet scalar which characterizes the radiative neutrino mass generation. It also is the origin of the Z 2 symmetry which guarantees the stability of dark matter. Several assumptions which are independently supposed in the original model are closely connected through this extension.

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“…Inflation in the scotogenic model extended with singlet scalars has been discussed from several motivations[57][58][59][60][61].…”

mentioning

confidence: 99%

Low scale leptogenesis in a model with promising CP structure

Suematsu

2021

Eur. Phys. J. C

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We consider a simple extension of the standard model, which could give a solution to its CP issues through both the Peccei–Quinn mechanism and the Nelson–Barr mechanism. Its low energy effective model coincides with the scotogenic model in the leptonic sector. Although leptogenesis is known not to work well at lower reheating temperature than $$10^9$$ 10 9 GeV in simple seesaw and scotogenic frameworks, such low reheating temperature could be consistent with both neutrino mass generation and thermal leptogenesis via newly introduced fields without referring to the resonance effect. An alternative dark matter candidate to axion is prepared as an indispensable ingredient of the model.

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Inflation due to a nonminimal coupling of singlet scalars in the radiative seesaw model

Cited by 13 publications

References 86 publications

Standard Model—axion—seesaw—Higgs portal inflation. Five problems of particle physics and cosmology solved in one stroke

Standard Model—axion—seesaw—Higgs portal inflation. Five problems of particle physics and cosmology solved in one stroke

Radiative neutrino mass model with degenerate right-handed neutrinos

Low scale leptogenesis in a model with promising CP structure

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