Scalaron the mighty: Producing dark matter and baryon asymmetry at reheating

Gorbunov, D.; Panin, A. G.

doi:10.1016/j.physletb.2011.04.067

Cited by 110 publications

(152 citation statements)

References 31 publications

(60 reference statements)

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“…We should mention that the RVM model provides a simple description of the graceful exit and reheating problem; see [23][24][25]27,87] for details. As for the Starobinsky model, the reheating of the Universe after the exit of the inflationary phase has been discussed for example in [88][89][90]. In contrast to the Starobinsky model, a general effective action from where the RVM can be derived is not known [16], and currently, this has been achieved only in some cases [13].…”

Section: Scalar Field Description: Rvm Versus Starobinskymentioning

confidence: 99%

Starobinsky-Like Inflation and Running Vacuum in the Context of Supergravity

2016

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Abstract:We describe the primeval inflationary phase of the early Universe within a quantum field theoretical (QFT) framework that can be viewed as the effective action of vacuum decay in the early times. Interestingly enough, the model accounts for the "graceful exit" of the inflationary phase into the standard radiation regime. The underlying QFT framework considered here is supergravity (SUGRA), more specifically an existing formulation in which the Starobinsky-type inflation (de Sitter background) emerges from the quantum corrections to the effective action after integrating out the gravitino fields in their (dynamically induced) massive phase. We also demonstrate that the structure of the effective action in this model is consistent with the generic idea of re-normalization group (RG) running of the cosmological parameters; specifically, it follows from the corresponding RG equation for the vacuum energy density as a function of the Hubble rate, ρ Λ (H). Overall, our combined approach amounts to a concrete-model realization of inflation triggered by vacuum decay in a fundamental physics context, which, as it turns out, can also be extended for the remaining epochs of the cosmological evolution until the current dark energy era.

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Section: Scalar Field Description: Rvm Versus Starobinskymentioning

confidence: 99%

Starobinsky-Like Inflation and Running Vacuum in the Context of Supergravity

2016

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“…of [17] and the second Ref. of [39]). If we extend gravitational interaction with matter sector to non-minimal one, preheating can be more efficient even in R 2 inflation [58].…”

Section: Discussionmentioning

confidence: 99%

No quasistable scalaron lump forms afterR2inflation

Takeda¹,

Watanabe²

2014

Phys. Rev. D

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In the Einstein frame picture of Starobinky's R 2 inflation model, cosmic inflation is driven by a slowly rolling inflaton field, called scalaron, and followed by a coherently oscillating scalaron phase. Since the scalaron oscillates excessively many times in its potential, which has a quadratic minimum and is a little shallower than quadratic on the positive side, it may fragment into long-living localized objects, called oscillons or I-balls, due to nonlinear growth of fluctuations before reheating of the universe. We show that while parametric self-resonances amplify scalaron fluctuations in the Minkowski background, the growth cannot overcome the decay due to expansion in the Friedmann background after R 2 inflation. By taking into account back-reaction from the metric of spacetime, modes that are larger than a critical scale are indeed amplified and become non-decaying. However, those non-decaying modes are not growing enough to form spatially localized lumps of the scalaron. Thus, reheating processes are unaltered by oscillons/I-balls and they proceed through perturbative decay of the scalaron as studied in the original work.

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“…Various aspects of reheating after R 2 inflation have been studied in refs. [16][17][18][19][20][21][22][23]. Ref.…”

Section: Jhep02(2015)105mentioning

confidence: 99%

“…Ref. [19] showed that dark matter and baryon asymmetry are produced at reheating by introducing Majorana neutrinos. Ref.…”

Section: Jhep02(2015)105mentioning

confidence: 99%

Reheating processes after Starobinsky inflation in old-minimal supergravity

Terada

Watanabe

Yamada

et al. 2015

J. High Energ. Phys.

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We study reheating processes and its cosmological consequences in the Starobinsky model embedded in the old-minimal supergravity. First, we consider minimal coupling between the gravity and matter sectors in the higher curvature theory, and transform it to the equivalent standard supergravity coupled to additional matter superfields. We then discuss characteristic decay modes of the inflaton and the reheating temperature T R . Considering a simple model of supersymmetry breaking sector, we estimate gravitino abundance from inflaton decay, and obtain limits on the masses of gravitino and supersymmetry breaking field. We find T R ≃ 1.0 × 10 9 GeV and the allowed range of gravitino mass as 10 4 GeV m 3/2 10 5 GeV, assuming anomaly-induced decay into the gauge sector as the dominant decay channel.

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Scalaron the mighty: Producing dark matter and baryon asymmetry at reheating

Cited by 110 publications

References 31 publications

Starobinsky-Like Inflation and Running Vacuum in the Context of Supergravity

Starobinsky-Like Inflation and Running Vacuum in the Context of Supergravity

No quasistable scalaron lump forms afterR2inflation

Reheating processes after Starobinsky inflation in old-minimal supergravity

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