Cosmologically viable low-energy supersymmetry breaking

Hook, Anson; McGehee, Robert; Murayama, Hitoshi

doi:10.1103/physrevd.98.115036

Cited by 20 publications

(18 citation statements)

References 79 publications

(103 reference statements)

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“…The gravitino is cosmologically equivalent to the neutrino-like Weyl relic that we have studied, as only the s = 1/2 modes are thermalized with the SM plasma in the early universe [52], and are expected to have the lowest relic temperature of 0.91 K. This has al-lowed previous work to constrain the gravitino mass by requiring that their abundance does not overcome that of the cosmological dark matter [82]. Our forecast above shows that current data is sensitive to gravitinos heavier than m X = 2.85 eV, which is around the benchmark of some models of SUSY breaking [83,84], and a factor of a few better than the best limits currently available [52,85]. Upcoming data from CMB-S4 combined with Euclid is expected to further detect such gravitino population masses above 0.63 eV.…”

Section: Fermionic Relicsmentioning

confidence: 53%

Finding eV-scale Light Relics with Cosmological Observables

DePorzio,

Xu,

Muñoz

et al. 2020

Preprint

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Cosmological data provide a powerful tool in the search for physics beyond the Standard Model (SM). An interesting target are light relics, new degrees of freedom which decoupled from the SM while relativistic. Nearly massless relics contribute to the radiation energy budget, and are commonly searched through variations in the effective number N eff of neutrino species. Additionally, relics with masses on the eV scale (meV-10 eV) become non-relativistic before today, and thus behave as matter instead of radiation. This leaves an imprint in the clustering of the large-scale structure of the universe, as light relics have important streaming motions, mirroring the case of massive neutrinos. Here we forecast how well current and upcoming cosmological surveys can probe light massive relics (LiMRs). We consider minimal extensions to the SM by both fermionic and bosonic relic degrees of freedom. By combining current and upcoming cosmic-microwave-background and large-scale-structure surveys, we forecast the significance at which each LiMR, with different masses and temperatures, can be detected. We find that a very large coverage of parameter space will be attainable by upcoming experiments, opening the possibility of exploring uncharted territory for new physics beyond the SM.

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Section: Fermionic Relicsmentioning

confidence: 53%

Finding eV-scale Light Relics with Cosmological Observables

DePorzio,

Xu,

Muñoz

et al. 2020

Preprint

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“…In this paper, we will first reexamine the previous analysis [24,25] in light of the gravitino problem. We will find that a phase transition from the supersymmetric vacuum to the metastable vacuum is not possible in the middle 0.4 keV m 3/2 1 GeV and heavy 600 GeV m 3/2 allowed regions [29] of gravitino mass. As a result, in order for the universe to be able to arrive at the metastable vacuum, a messenger model that is compatible with the light gravitino mass is needed.…”

Section: Introductionmentioning

confidence: 88%

Gravitational Waves in Metastable Supersymmetry Breaking

Chu,

Ito

2022

Preprint

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If supersymmetry is broken in metastable vacua, it is not clear why we are now in there rather than supersymmetric vacua. Moreover, it is natural to expect that we were in supersymmetric vacua, which have higher symmetry than metastable vacua, in the early universe. In this paper, we reexamine and improve the previous analysis on the cosmological evolution of the vacuum structure in the ISS model of metastable supersymmetry breaking by taking into account constraints on the reheating temperature, which is needed to avoid the overproduction of gravitinos. It turns out that the desired phase transition from a supersymmetric vacuum to a metastable vacuum is allowed only in the light gravitino mass region m 3/2 < 4.7 eV. This is achieved by either rolling down a potential or tunneling processes depending on the reheating temperature. We show that when the tunneling processes are realized, abundant gravitational waves could be produced from collisions of runaway bubbles. The resulting gravitational waves are detectable with the future gravitational wave interferometers like LISA and DECIGO.

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“…[52], avoids the gravitino problem. The rough estimate of m 3/2 ∼ 10 MeV even needs T R 10 5 GeV in order to not overclose the universe with thermally produced gravitinos after inflation [53][54][55][56]. Interestingly, such low reheating temperatures preserve high-scale global minima after inflation, see Ref.…”

Section: Model Descriptionmentioning

confidence: 99%

Phenomenology of the inflation-inspired NMSSM at the electroweak scale

et al. 2019

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The concept of Higgs inflation can be elegantly incorporated in the Next-to-Minimal Supersymmetric Standard Model (NMSSM). A linear combination of the two Higgs-doublet fields plays the role of the inflaton which is non-minimally coupled to gravity. This non-minimal coupling appears in the low-energy effective superpotential and changes the phenomenology at the electroweak scale. While the field content of the inflation-inspired model is the same as in the NMSSM, there is another contribution to the μ term in addition to the vacuum expectation value of the singlet. We explore this extended parameter space and point out scenarios with phenomenological differences compared to the pure NMSSM. A special focus is set on the electroweak vacuum stability and the parameter dependence of the Higgs and neutralino sectors. We highlight regions which yield a SM-like 125 GeV Higgs boson compatible with the experimental observations and are in accordance with the limits from searches for additional Higgs bosons. Finally, we study the impact of the non-minimal coupling to gravity on the Higgs mixing and in turn on the decays of the Higgs bosons in this model. Contents

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Cosmologically viable low-energy supersymmetry breaking

Cited by 20 publications

References 79 publications

Finding eV-scale Light Relics with Cosmological Observables

Finding eV-scale Light Relics with Cosmological Observables

Gravitational Waves in Metastable Supersymmetry Breaking

Phenomenology of the inflation-inspired NMSSM at the electroweak scale

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