Affleck-Dine baryogenesis in type IIB string models

Allahverdi, Rouzbeh; Cicoli, Michele; Muia, Francesco

doi:10.1007/jhep06(2016)153

Cited by 21 publications

(24 citation statements)

References 76 publications

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“…(3.20) 10 Another potential problem could arise from thermal corrections which could destabilise the volume mode potential, leading to a decompactification limit [36]. However this can be shown to be never the case for Kähler moduli inflation [37].…”

Section: Kähler Moduli Inflationmentioning

confidence: 99%

Moduli vacuum misalignment and precise predictions in string inflation

Cicoli

Dutta

Maharana

et al. 2016

J. Cosmol. Astropart. Phys.

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The predictions for all the cosmological observables of any inflationary model depend on the number of e-foldings which is sensitive to the post-inflationary history of the universe. In string models the generic presence of light moduli leads to a late-time period of matter domination which lowers the required number of e-foldings and, in turn, modifies the exact predictions of any inflationary model. In this paper we compute exactly the shift of the number of e-foldings in Kähler moduli inflation which is determined by the magnitude of the moduli initial displacement caused by vacuum misalignment and the moduli decay rates. We find that the preferred number of e-foldings gets reduced from 50 to 45, causing a modification of the spectral index at the percent level. Our results illustrate the importance of understanding the full post-inflationary evolution of the universe in order to derive precise predictions in string inflation. To perform this task it is crucial to work in a setting where there is good control over moduli stabilisation. arXiv:1604.08512v1 [hep-th]

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Section: Kähler Moduli Inflationmentioning

confidence: 99%

Moduli vacuum misalignment and precise predictions in string inflation

Cicoli

Dutta

Maharana

et al. 2016

J. Cosmol. Astropart. Phys.

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“…moduli) domination takes place. This can lead to additional contributions of dark radiation [4,5], baryogenesis [6] and a nonthermal production of dark matter [7] (see [8] for a review).…”

Section: Introductionmentioning

confidence: 99%

Oscillons from string moduli

Antusch

Cefalà

Krippendorf³

et al. 2018

J. High Energ. Phys.

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135

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A generic feature of string compactifications is the presence of many scalar fields, called moduli. Moduli are usually displaced from their post-inflationary minimum during inflation. Their relaxation to the minimum could lead to the production of oscillons: localised, long-lived, non-linear excitations of the scalar fields. Here we discuss under which conditions oscillons can be produced in string cosmology and illustrate their production and potential phenomenology with two explicit examples: the case of an initially displaced volume modulus in the KKLT scenario and the case of a displaced blow-up Kähler modulus in the Large Volume Scenario (LVS). One, in principle, observable consequence of oscillon dynamics is the production of gravitational waves which, contrary to those produced from preheating after high scale inflation, could have lower frequencies, closer to the currently observable range. We also show that, for the considered parameter ranges, oscillating fibre and volume moduli do not develop any significant non-perturbative dynamics. Furthermore, we find that the vacua in the LVS and the KKLT scenario are stable against local overshootings of the field into the decompatification region, which provides an additional check on the longevity of these metastable configurations.

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“…This is crucial to have full control over the inflationary dynamics since it determines the properties of all directions orthogonal to the inflaton and fixes all the mass and energy scales in the model. On top of moduli stabilisation, other important issues to trust inflationary models building are the study of the post-inflationary cosmological history starting with reheating [9][10][11][12][13] and the interplay between inflation and other phenomenological implications of the same model like the supersymmetry breaking scale [14][15][16][17][18], the nature of dark matter [19][20][21][22][23] and dark radiation [24][25][26][27] or the origin of the matter-antimatter asymmetry [28,29].…”

Section: Introductionmentioning

confidence: 99%

Global embedding of fibre inflation models

Cicoli

Muia

Shukla

2016

J. High Energ. Phys.

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We present concrete embeddings of fibre inflation models in globally consistent type IIB Calabi-Yau orientifolds with closed string moduli stabilisation. After performing a systematic search through the existing list of toric Calabi-Yau manifolds, we find several examples that reproduce the minimal setup to embed fibre inflation models. This involves Calabi-Yau manifolds with h 1,1 = 3 which are K3 fibrations over a P 1 base with an additional shrinkable rigid divisor. We then provide different consistent choices of the underlying brane set-up which generate a non-perturbative superpotential suitable for moduli stabilisation and string loop corrections with the correct form to drive inflation. For each Calabi-Yau orientifold setting, we also compute the effect of higher derivative contributions and study their influence on the inflationary dynamics.

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Affleck-Dine baryogenesis in type IIB string models

Cited by 21 publications

References 76 publications

Moduli vacuum misalignment and precise predictions in string inflation

Moduli vacuum misalignment and precise predictions in string inflation

Oscillons from string moduli

Global embedding of fibre inflation models

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