Matter–antimatter asymmetry induced by a running vacuum coupling

Lima, J. A. S.; Singleton, Douglas

doi:10.1140/epjc/s10052-017-5429-x

Cited by 5 publications

(5 citation statements)

References 47 publications

(130 reference statements)

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“…can be obtained for a large range of the relevant parameters ( , ) of the present model [34,35]. Thus, as remarked before, the proposed running vacuum cosmology may also provide a successful baryogenesis mechanism.…”

Section: Final Comments and Conclusionsupporting

confidence: 71%

“…(iv) Baryogenesis problem: recently, it was shown that the matter-antimatter asymmetry can also be induced by a derivative coupling between the running vacuum and a nonconserving baryon current [34,35]. Such an ingredient breaks dynamically CPT thereby triggering baryogenesis through an effective chemical potential (for a different but related approach see [36]).…”

Section: Final Comments and Conclusionmentioning

confidence: 99%

“…(vi) Cosmological constant problem: it is known that phenomenological decaying vacuum models are unable to solve this conundrum [22,34]. The basic reason seems to be related to the clear impossibility to predict the present day value of the vacuum energy density (or equivalently the value of 0 ) from first principles.…”

Section: Final Comments and Conclusionmentioning

confidence: 99%

See 2 more Smart Citations

From de Sitter to de Sitter: Decaying Vacuum Models as a Possible Solution to the Main Cosmological Problems

Zilioti

Santos

Lima

2018

Advances in High Energy Physics

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The publication of this article was funded by SCOAP 3 .Decaying vacuum cosmological models evolving smoothly between two extreme (very early and late time) de Sitter phases are able to solve or at least to alleviate some cosmological puzzles; among them we have (i) the singularity, (ii) horizon, (iii) gracefulexit from inflation, and (iv) the baryogenesis problem. Our basic aim here is to discuss how the coincidence problem based on a large class of running vacuum cosmologies evolving from de Sitter to de Sitter can also be mollified. It is also argued that even the cosmological constant problem becomes less severe provided that the characteristic scales of the two limiting de Sitter manifolds are predicted from first principles.

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Section: Final Comments and Conclusionsupporting

confidence: 71%

Section: Final Comments and Conclusionmentioning

confidence: 99%

See 1 more Smart Citation

From de Sitter to de Sitter: Decaying Vacuum Models as a Possible Solution to the Main Cosmological Problems

Zilioti

Santos

Lima

2018

Advances in High Energy Physics

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“…It is easy to notice that the observed baryon asymmetry cannot be generated from GB when p = 1 3 ρ which corresponds to a radiation dominated Universe. The GB mechanism has been studied in the context of f (R) gravity [6,7], brane world scenarios [8], loop quantum cosmology [9], f (T ) gravity [10], Gauss-Bonnet brane world cosmology [11], Gauss-Bonnet gravity [12], running vacuum models [13,14], Symmergent Gravity [15][16][17][18][19], alternative models [20][21][22][23][24] and Horava gravity [25].…”

Section: Introductionmentioning

confidence: 99%

Matter-antimatter asymmetry induced by non-linear electrodynamics

Benaoum

Овгун

2021

Class. Quantum Grav.

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In this work, we propose an economical model to address some open cosmological problems such as the absence of the initial cosmological singularity, an early acceleration of the Universe and the generation of matter–antimatter asymmetry. The model is based on a scenario in which the early Universe consists of a non-linear electrodynamics (NLED) fields. It is found that the NLED model has an equation of state p = 1 3 ρ − 4 3 β ρ 1 + α which shows that the Universe undergoes an early epoch acceleration to a radiation era given by p = 1 3 ρ . We show that the singularities in the energy density, pressure and curvature are absent at early stages. In our scenario, the baryon asymmetry is generated by the non-linearity parameter β. Additionally, we calculate the resulting baryon asymmetry and discuss how a successful gravitational baryogenesis is obtained for different values of the model’s parameter space.

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Section: Introductionmentioning

confidence: 99%

Matter-antimatter asymmetry induced by non-linear electrodynamics

Benaoum,

Ovgun

2021

Preprint

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In this work, we propose an economical model to address some open cosmological problems such as the absence of the initial cosmological singularity, an early acceleration of the Universe and the generation of matter-antimatter asymmetry. The model is based on a scenario in which the early Universe consists of a non-linear electrodynamics fields. It is found that the non-linear electrodynamics model has an equation of state p = 1 3 ρ − 4 3 βρ 1+α which shows that the Universe undergoes an early epoch acceleration to a radiation era given by p = 1 3 ρ. We show that the singularities in the energy density, pressure and curvature are absent at early stages. In our scenario, the baryon asymmetry is generated by the non-linearity parameter β. Additionally, we calculate the resulting baryon asymmetry and discuss how a successful gravitational baryogenesis is obtained for different values of the model's parameter space.

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Matter–antimatter asymmetry induced by a running vacuum coupling

Cited by 5 publications

References 47 publications

From de Sitter to de Sitter: Decaying Vacuum Models as a Possible Solution to the Main Cosmological Problems

From de Sitter to de Sitter: Decaying Vacuum Models as a Possible Solution to the Main Cosmological Problems

Matter-antimatter asymmetry induced by non-linear electrodynamics

Matter-antimatter asymmetry induced by non-linear electrodynamics

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