Type I seesaw mechanism as the common origin of neutrino mass, baryon asymmetry, and the electroweak scale

Brdar, Vedran; Helmboldt, Alexander J.; Iwamoto, Sho; Schmitz, Kai

doi:10.1103/physrevd.100.075029

Cited by 37 publications

(29 citation statements)

References 167 publications

(277 reference statements)

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“…We finally note that the lepton number asymmetry sufficient for the generation of observable baryon asymmetry of the Universe can be produced in right-handed neutrino decays as previously shown in the literature [36,37] and such production is independent of a DM production mechanism. In combination with the generation of light neutrino masses and absence of the hierarchy problem (together with potential baryon asymmetry production from N R decays), we have, hence, demonstrated that the considered well-motivated model can successfully and simultaneously tackle some of the most relevant puzzles in high-energy physics.…”

Section: Discussionsupporting

confidence: 64%

“…While we will not study leptogenesis [31,32] for the purpose of generating successful baryon asymmetry of the Universe, we point out that our DM production is fully consistent with resonant leptogenesis [33][34][35] that was previously shown to be successful for the neutrino option [36,37]. Namely, DM production precedes right-handed neutrino decays, and in addition any relevant washout processes involving particles from a hidden sector are suppressed by the heavy mass scale.…”

Section: Introductionmentioning

confidence: 56%

“…Such decays, while irrelevant for DM production, can, however, play a role in producing the required amount of baryon asymmetry of the Universe, as shown in Refs. [36,37]. S abundance increases and reaches maximum slightly before it decays away.…”

Section: B Resultsmentioning

confidence: 97%

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Heavy dark matter, neutrino masses, and Higgs naturalness from a strongly interacting hidden sector

2020

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We consider the extension of the Standard Model (SM) with a strongly interacting QCD-like hidden sector, at least two generations of right-handed neutrinos, and one scalar singlet. Once the scalar singlet obtains a nonzero vacuum expectation value, active neutrino masses are generated through a type-I seesaw mechanism. Simultaneously, the electroweak scale is generated through the radiative corrections involving these massive fermions. This is the essence of the scenario that is known as the "neutrino option" for which the successful masses of right-handed neutrinos are in the range 10 7-10 8 GeV. The main goal of this work is to scrutinize the potential to accommodate dark matter in such a realization. The dark matter candidates are Nambu-Goldstone bosons which appear due to the dynamical breaking of the hidden chiral symmetry. The mass spectrum studied in this work is such that masses of Nambu-Goldstone bosons and the singlet scalar exceed those of right-handed neutrinos. Having the masses of all relevant particles several orders of magnitude above OðTeVÞ, the freeze-out of dark matter is not achievable, and, hence, we turn to alternative scenarios, namely, freeze-in. The Nambu-Goldstone bosons can interact with particles that are not in the SM but, however, have non-negligible abundance through their not-too-small couplings with the SM. Utilizing this, we demonstrate that the dark matter in the model is successfully produced at a temperature scale where the right-handed neutrinos are still stable. We note that the lepton number asymmetry sufficient for the generation of observable baryon asymmetry of the Universe can be produced in right-handed neutrino decays. Hence, we infer that the model has the potential to simultaneously address several of the most relevant puzzles in contemporary high-energy physics.

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Section: Discussionsupporting

confidence: 64%

Section: Introductionmentioning

confidence: 56%

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Heavy dark matter, neutrino masses, and Higgs naturalness from a strongly interacting hidden sector

2020

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“…While this work was in process, we became aware of related work by Vedran Brdar, Alexander J. Helmboldt, Sho Iwamoto and Kai Schmitz, who find analogous results on the viability of leptogenesis in the Neutrino Option [78]. Previous work by some of the same authors, that identified a possible embedding of the Neutrino Option in a conformal theory,should also be acknowledged here [26,27].…”

Section: Notementioning

confidence: 74%

Leptogenesis in the Neutrino Option

Brivio¹,

Moffat

Pascoli

et al. 2019

J. High Energ. Phys.

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We examine the compatibility between the Neutrino Option, in which the electroweak scale is generated by PeV mass type I seesaw Majorana neutrinos, and leptogenesis. We find the Neutrino Option is consistent with resonant leptogenesis. Working within the minimal seesaw scenario with two heavy Majorana neutrinos N 1,2 , which form a pseudo-Dirac pair, we explore the viable parameter space. We find that the Neutrino Option and successful leptogenesis are compatible in the cases of a neutrino mass spectrum with normal (inverted) ordering for 1.2×10 6 < M (GeV) < 8.8×10 6 (2.4×10 6 < M (GeV) < 7.4×10 6 ), with M = (M 1 + M 2 )/2 and M 1,2 the masses of N 1,2 . Successful leptogenesis requires that ∆M/M ≡ (M 2 − M 1 )/M ∼ 10 −8 . We further show that leptogenesis can produce the baryon asymmetry of the Universe within the Neutrino Option scenario when the requisite CP violation in leptogenesis is provided exclusively by the Dirac or Majorana low energy CP violation phases of the PMNS matrix.

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“…[3]. Alternatively, the electroweak scale can be radiatively generated from quantum fluctuations of heavy right-handed neutrinos [18][19][20][21][22], which simultaneously produce light active neutrino masses via the type-I seesaw mechanism [23][24][25][26]. Interestingly, both methods of scale transmission are anticipated to be testable by gravitational wave detectors [8,13].…”

mentioning

confidence: 99%

Strong supercooling as a consequence of renormalization group consistency

Brdar¹,

Helmboldt²,

Lindner³

2019

J. High Energ. Phys.

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Classically scale-invariant models are attractive not only because they may offer a solution to the long-standing gauge hierarchy problem, but also due to their role in facilitating strongly supercooled cosmic phase transitions. In this paper, we investigate the interplay between these two aspects. We do so in the context of the electroweak phase transition (EWPT) in the minimal scale-invariant theory. We find that the amount of supercooling generally decreases for increasing scalar couplings. However, the stabilization of the electroweak scale against the Planck scale requires the absence of Landau poles in the respective energy range. Scalar couplings at the TeV scale can therefore not become larger than O(10 −1 ). As a consequence, all fully consistent parameter points predict the EWPT not to complete before the QCD transition, which then eventually triggers the generation of the electroweak scale. We also discuss the potential of the model to give rise to an observable gravitational wave signature, as well as the possibility to accommodate a dark matter candidate.

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Type I seesaw mechanism as the common origin of neutrino mass, baryon asymmetry, and the electroweak scale

Cited by 37 publications

References 167 publications

Heavy dark matter, neutrino masses, and Higgs naturalness from a strongly interacting hidden sector

Heavy dark matter, neutrino masses, and Higgs naturalness from a strongly interacting hidden sector

Leptogenesis in the Neutrino Option

Strong supercooling as a consequence of renormalization group consistency

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