Inverse Seesaw, dark matter and the Hubble tension

Fernández‐Martínez, E.; Pierre, Mathias; Pinsard, Emanuelle; Rosauro-Alcaraz, Salvador

doi:10.1140/epjc/s10052-021-09760-y

Cited by 26 publications

(12 citation statements)

References 76 publications

(95 reference statements)

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“…In the latter case, we assume that any explicit symmetry breaking term is small compared to the electroweak scale such that the mass of the (P)NGB can be set to zero in the following analysis. Using the exponential parametrization, the field a disappears from the scalar potential and the only coupling between the Higgs boson at 125 GeV and the (P)NGB is generated via mixing from the kinetic terms of the scalar after spontaneous symmetry breaking [85,86],…”

Section: (Pseudo) Nambu-goldstone Bosonsmentioning

confidence: 99%

Higgs-boson visible and invisible constraints on hidden sectors

Biekötter

Pierre

2022

Eur. Phys. J. C

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We investigate the impact of interactions between hidden sectors and the discovered Higgs boson $$h_{125}$$ h 125 , allowing for additional invisible decay channels of $$h_{125}$$ h 125 . We perform $$\chi ^2$$ χ 2 -fits to the measurements of the Higgs-boson cross sections as a function of the invisible branching ratio and different combinations of coupling modifiers, where the latter quantify modifications of the couplings of $$h_{125}$$ h 125 compared to the predictions of the Standard Model. We present generic results in terms of exclusion limits on the coupling modifiers and the invisible branching ratio of $$h_{125}$$ h 125 . Additionally, we apply our results to a variety of concrete model realizations containing a hidden sector: dark matter within Higgs- and singlet-portal scenarios, models featuring (pseudo) Nambu–Goldstone bosons and two Higgs doublet extensions. One of the main conclusions of our work is that in a wide class of models the indirect constraints resulting from the measurements of the cross sections of $$h_{125}$$ h 125 provide substantially stronger constraints on the invisible Higgs-boson branching ratio compared to the direct limits obtained from searches for the invisible decay of $$h_{125}$$ h 125 . However, we demonstrate that the presence of an invisible decay mode of $$h_{125}$$ h 125 can also open up parameter space regions which otherwise would be excluded as a result of the indirect constraints. As a byproduct of our analysis, we show that in light of the new results from the LZ collaboration a fermionic DM candidate within the simplest Higgs-portal scenario is ruled out under standard assumptions.

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Section: (Pseudo) Nambu-goldstone Bosonsmentioning

confidence: 99%

Higgs-boson visible and invisible constraints on hidden sectors

Biekötter

Pierre

2022

Eur. Phys. J. C

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“…Although not as phenomenologically successful as NEDE, different attempts to relate the Hubble tension and the neutrino sector have been made in the past[34,40,52,53], most notably[20,24] explores the possibility that the EDE field is pushed up its potential when neutrinos become non-relativistic (see also[54] for a DE neutrino interaction). To our knowledge, our work is the first to use the NEDE phase transition for higgsing the neutrino sector.…”

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confidence: 99%

Hot new early dark energy: Towards a unified dark sector of neutrinos, dark energy and dark matter

Niedermann

Sloth²

2022

Physics Letters B

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“…For M 0 N < 1 GeV, the decays of N during the recombination period releases entropy into the thermal bath and impacts Big Bang Nucleosynthesis, which in general places strong limits on the mixing and mass parameters and requires in particular M 0 N ≥ O(0.1) GeV [11]. On the other hand, it has been shown that decaying heavy neutrinos with masses O(30) MeV [35] and sterile neutrinos that interact with additional scalars can alleviate the Hubble tension [36]. We will limit our discussion to M 0 N ≥ 0.1 GeV in the following.…”

Section: Constraintsmentioning

confidence: 99%

Robustness of ARS Leptogenesis in Scalar Extensions

Fischer,

Lindner,

van der Woude

2021

Preprint

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Extensions of the Standard Model (SM) with sterile neutrinos are well motivated from the observed oscillations of the light neutrinos and they have shown to successfully explain the Baryon Asymmetry of the Universe (BAU) through, for instance, the so-called ARS leptogenesis. Sterile neutrinos can be added in minimal ways to the SM, but many theories exist where sterile neutrinos are not the only new fields. Such theories often include scalar bosons, which brings about the possibility of further interactions between the sterile neutrinos and the SM. In this paper we consider an extension of the SM with two sterile neutrinos and one scalar singlet particle and investigate the effect that an additional, thermalised, scalar has on the ARS leptogenesis mechanism. We show that in general the created asymmetry is reduced due to additional sterile neutrino production from scalar decays. When sterile neutrinos and scalars are discovered in the laboratory, our results will provide information on the applicability of the ARS leptogenesis mechanism.

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Inverse Seesaw, dark matter and the Hubble tension

Cited by 26 publications

References 76 publications

Higgs-boson visible and invisible constraints on hidden sectors

Higgs-boson visible and invisible constraints on hidden sectors

Hot new early dark energy: Towards a unified dark sector of neutrinos, dark energy and dark matter

Robustness of ARS Leptogenesis in Scalar Extensions

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