Inflation from high-scale supersymmetry breaking

Domcke, Valerie; Schmitz, Kai

doi:10.1103/physrevd.97.115025

Cited by 25 publications

(20 citation statements)

References 273 publications

(512 reference statements)

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“…[70]). Such high gravitino mass can be considered high-scale SUSY [71], intermediate scale supersymmetry [72], and unified inflation model [16]. However, gravitino cannot be too heavy because Br φ→ψµN 3 should be less than unity for the reheating.…”

Section: Gravitino Problemmentioning

confidence: 99%

Leptogenesis after superconformal subcritical hybrid inflation

Gunji

Ishiwata

2019

J. High Energ. Phys.

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We consider an extended version of superconformal subcritical hybrid inflation model by introducing three right-handed neutrinos that have Majorana mass terms. In the model one of the right-handed sneutrinos plays a role of the inflaton field, and it decays to reheat the universe after inflation. Vacuum expectation value for the waterfall field gives an unconventional pattern of the light neutrino mass matrix, and the neutrino Yukawa couplings that determine the reheating temperature are not constrained by the neutrino oscillation data.Consequently thermal leptogenesis or sneutrino leptogenesis is realized.

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Section: Gravitino Problemmentioning

confidence: 99%

Leptogenesis after superconformal subcritical hybrid inflation

Gunji

Ishiwata

2019

J. High Energ. Phys.

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“…The crucial observation is that hybrid inflation ends via a rapid second-order phase transition [39,40]. This so-called waterfall transition can be identified as the spontaneous breaking of (a subgroup of) a local GUT symmetry, such as, e.g., U (1) B−L [41][42][43][44][45][46][47][48][49].…”

Section: Introductionmentioning

confidence: 99%

“…As an alternative to decaying cosmic strings, one may also extend our model by additional symmetry-breaking fields that are marginally coupled to the waterfall fields of DHI and that break the U (1) symmetry already during inflation. In this case, cosmic strings would be produced at early times and subsequently strongly diluted in consequence of the exponential expansion during inflation (see, e.g., [48,49]).…”

Section: Introductionmentioning

confidence: 99%

“…In the following, we will not specify the exact nature of this coupling, which requires further model building and is thus beyond the scope of this work. Instead, we will merely assume that the duration of reheating is controlled by the perturbative decay of the U (1) Higgs field φ (see also [41][42][43][44][45][46][47][48][49]). Then, if we parametrize the φ decay rate Γ φ in a modelindependent way by an effective coupling constant λ eff ,…”

Section: Introductionmentioning

confidence: 99%

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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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“…A positive quartic correction to K is then needed to create a flat maximum at the origin providing naturally slow-roll small-field inflation in a model independent way. Indeed, the effective field theory has two parameters that can fit the amplitude and the spectral index of 1 See [2][3][4] for earlier works on relating supersymmetry breaking with inflation and also [5][6][7][8][9][10][11][12][13][14][15] for related approaches along this direction. 2 The η-problem is also evaded in hybrid inflation models by a somewhat similar way (see e.g.…”

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confidence: 99%

A microscopic model for inflation from supersymmetry breaking

et al. 2019

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We have proposed recently a framework for inflation driven by supersymmetry breaking with the inflaton being a superpartner of the goldstino, that avoids the main problems of supergravity inflation, allowing for: naturally small slow-roll parameters, small field initial conditions, absence of a (pseudo)scalar companion of the inflaton, and a nearby minimum with tuneable cosmological constant. It contains a chiral multiplet charged under a gauged R-symmetry which is restored at the maximum of the scalar potential with a plateau where inflation takes place. The effective field theory relies on two phenomenological parameters corresponding to corrections to the Kähler potential up to second order around the origin. The first guarantees the maximum at the origin and the second allows the tuning of the vacuum energy between the F- and D-term contributions. Here, we provide a microscopic model leading to the required effective theory. It is a Fayet–Iliopoulos model with two charged chiral multiplets under a second R-symmetry coupled to supergravity. In the Brout–Englert–Higgs phase of this , the gauge field becomes massive and can be integrated out in the limit of small supersymmetry breaking scale. In this work, we perform this integration and we show that there is a region of parameter space where the effective supergravity realises our proposal of small field inflation from supersymmetry breaking consistently with observations and with a minimum of tuneable energy that can describe the present phase of our Universe.

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Inflation from high-scale supersymmetry breaking

Cited by 25 publications

References 273 publications

Leptogenesis after superconformal subcritical hybrid inflation

Leptogenesis after superconformal subcritical hybrid inflation

Trans-Planckian censorship and inflation in grand unified theories

A microscopic model for inflation from supersymmetry breaking

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