|
| | | | |
| | | |
| Stat |
Members: 3665
Articles: 2'599'751
Articles rated: 2609
25 January 2025 |
|
| | | | |
|
Article overview
| |
|
|
Moduli Stabilisation, de Sitter Vacua and Hybrid Inflation in Large Volume Compactifications | | Waqas Ahmed
; Athanasios Karozas
; George K. Leontaris
; Ilias Tavellaris
; | | Date: |
1 Jan 2023 | | Abstract: | We study the cosmological implications of an effective field theory model
derived within a configuration of D7 brane stacks in the framework of type-IIB
string theory. We consider a suitable geometric setup where the K"ahler moduli
fields are stabilised and the parametric space is constrained so that a de
Sitter vacuum is ensured. In addition to the moduli fields we also take into
account the usual Higgs and matter fields included in the effective field
theory. In this background we implement the standard hybrid inflation scenario
with a singlet scalar field acting as the inflaton and the Higgs states serving
as waterfall fields. Radiative corrections and soft supersymmetry breaking
terms play an essential role in the realisation of a successful inflationary
scenario consistent with the present cosmological data. Small tensor-to-scalar
ratio values are predicted, which can be probed in future planned experiments.
Further constraints on the model’s parameters are derived from bounds on dark
radiation, which is measured as a contribution to the effective number of
neutrino species $N_{eff}$. In particular, we find an excess of $Delta
N_{eff}leq{0.95}$ at $2sigma$ confidence level with natural values of the
involved couplings. | | Source: | arXiv, 2301.00329 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
|
| |
|
|
|
REGISTER