Leptogenesis after superconformal subcritical hybrid inflation

Gunji, Yoshihiro; Ishiwata, Koji

doi:10.1007/jhep09(2019)065

Cited by 6 publications

(10 citation statements)

References 76 publications

(115 reference statements)

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“…From the superpotential, the light neutrinos acquire masses in the seesaw mechanism [107][108][109][110][111][112]. In our model, however, S + obtains a vacuum expectation value (VEV), denoted as S + , at the global minimum, which leads to an unconventional mass matrix for the light neutrinos [105]. In addition, the components of the mass matrices are given in a limited number of parameters due to A 4 symmetry, which results in the characteristic pattern of the neutrino mixing and CP phases in the lepton sector.…”

Section: Neutrino Masses and Mixing Patternmentioning

confidence: 89%

“…We notice that the lightest neutrino mass becomes zero since rank of M ν is two [105]. Therefore, by imposing the condition in which the neutrino mass squared differences are within 3σ range of the observed values, the cosmological upper bound on the sum of light neutrino masses [113,114] i…”

Section: ŷmentioning

confidence: 91%

“…The superpotential is similar to one considered in ref. [105], but it is extended to accommodate the modular A 4 symmetry. The contents of the fields are listed in table 1.…”

Section: The Superpotential and Kähler Potentialmentioning

confidence: 99%

“…As in the literature [99,100,102,103,105], we focus on the dynamics of the subcritical regime of the hybrid inflation. First of all, the Majorana mass term shifts the critical point value of the hybrid inflation.…”

Section: Critical Pointmentioning

confidence: 99%

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Subcritical regime of hybrid inflation with modular A4 symmetry

Gunji

Ishiwata

Yoshida

2022

J. High Energ. Phys.

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We consider a supergravity model that has the modular A4 symmetry and discuss the interplay between the neutrino mixing and inflation. The model contains right- handed neutrinos that have the Majorana masses and additional Yukawa couplings to the waterfall field. In the model an active neutrino is massless and we find that only the inverted hierarchy is allowed and the Majorana phase is predicted to be around ±(120–180)° from the observed neutrino mixing data. In the early universe, one of right-handed sneutrinos plays the role of the inflaton field. Focusing on the subcritical regime of the hybrid inflation that is consistent with the cosmic microwave background data, we analyze the dynamics of the scalar sector and derive an upper bound (1010) GeV on the scale of the Majorana mass.

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Section: Neutrino Masses and Mixing Patternmentioning

confidence: 89%

Section: ŷmentioning

confidence: 91%

“…The superpotential is similar to one considered in ref. [105], but it is extended to accommodate the modular A 4 symmetry. The contents of the fields are listed in table 1.…”

Section: The Superpotential and Kähler Potentialmentioning

confidence: 99%

Section: Critical Pointmentioning

confidence: 99%

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Subcritical regime of hybrid inflation with modular A4 symmetry

Gunji

Ishiwata

Yoshida

2022

J. High Energ. Phys.

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“…3 The opposite scenario, κ ≪ g, has been considered in [62,63] (see also [64][65][66][67]), which results in a super-Planckian critical field value, s crit > M Pl . In this case, inflation occurs during the waterfall transition and leads to an O (0.1) tensor-to-scalar ratio.…”

Section: Introductionmentioning

confidence: 99%

Trans-Planckian censorship and inflation in grand unified theories

Schmitz

2020

Physics Letters B

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The recently proposed trans-Planckian censorship conjecture (TCC) amounts to the claim that inflation models with an inflationary energy scale larger than Λ max inf ∼ 10 9 GeV belong to the swampland, i.e., cannot be embedded into a consistent theory of quantum gravity. In this paper, we point out that this constraint can be readily satisfied in D-term hybrid inflation (DHI), which is a well-motivated inflation scenario in the context of supersymmetric grand unification. In DHI, the amplitude of the primordial scalar power spectrum originates from a Fayet-Iliopoulos term of the order of the unification scale, √ ξ ∼ 10 16 GeV. At the same time, the TCC results in an upper bound on the corresponding gauge coupling constant of gmax ∼ 10 −14 . We are able to show that this constraint translates into an upper bound on the gravitino mass of m max 3/2 ∼ 10 MeV, which opens the possibility that dark matter is accounted for by thermally produced gravitinos, if the reheating temperature is close to T reh ∼ 100 TeV. Interestingly enough, a somewhat similar gravitino mass range has recently been derived in a model that aims at explaining dark energy in terms of axion quintessence and resolving the Hubble tension by means of decaying gravitino dark matter.

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Supersymmetric baryogenesis in a hybrid inflation model

Gunji,

Ishiwata,

Yoshida

2023

J. High Energ. Phys.

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We study baryogenesis in a hybrid inflation model which is embedded to the minimal supersymmetric model with right-handed neutrinos. Inflation is induced by a linear combination of the right-handed sneutrinos and its decay reheats the universe. The decay products are stored in conserved numbers, which are transported under the interactions in equilibrium as the temperature drops down. We find that at least a few percent of the initial lepton asymmetry is left under the strong wash-out due to the lighter right-handed (s)neutrinos. To account for the observed baryon number and the active neutrino masses after a successful inflation, the inflaton mass and the Majorana mass scale should be 1013 GeV and $$ \mathcal{O} $$ O (109–1010) GeV, respectively.

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Leptogenesis after superconformal subcritical hybrid inflation

Cited by 6 publications

References 76 publications

Subcritical regime of hybrid inflation with modular A4 symmetry

Subcritical regime of hybrid inflation with modular A4 symmetry

Trans-Planckian censorship and inflation in grand unified theories

Supersymmetric baryogenesis in a hybrid inflation model

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