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DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Notari, Alessio | - |
dc.contributor.author | Simeon Miquel, Guillem | - |
dc.date.accessioned | 2018-10-10T12:43:23Z | - |
dc.date.available | 2018-10-10T12:43:23Z | - |
dc.date.issued | 2018-06 | - |
dc.identifier.uri | http://hdl.handle.net/2445/125262 | - |
dc.description | Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Curs: 2018, Tutor: Alessio Notari | ca |
dc.description.abstract | Natural Inflation is a model for inflation where the potential of the inflaton is V (φ) = ∧4[1 + cos(φ/ ∫ )] and thus exhibits a discrete shift symmetry φ - φ + 2π∫ . Successful inflation can be chieved if ∫ > ∼ few MPl and ∧ ∼ mGUT ∼ 1016 GeV. However, the latest observational constraints put Natural Inflation in tension with data. We propose in this letter the introduction of a non-minimal coupling to gravity Υ2(φ)R that respects the characteristic shift symmetry and the periodicity of the potential. We show that the agreement with cosmological data can be substantially improved, obtaining a scale ∧ ∼ 1015 ∼ 1016 GeV, and furthermore, in certain cases, successful inflation can be achieved even for a periodicity scale smaller than the Planck scale | ca |
dc.format.extent | 5 p. | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | ca |
dc.rights | cc-by-nc-nd (c) Simeon, 2018 | - |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/es/ | * |
dc.source | Treballs Finals de Grau (TFG) - Física | - |
dc.subject.classification | Expansió de l'univers | cat |
dc.subject.classification | Relativitat general (Física) | cat |
dc.subject.classification | Treballs de fi de grau | cat |
dc.subject.other | Expanding universe | eng |
dc.subject.other | General relativity (Physics) | eng |
dc.subject.other | Bachelor's theses | eng |
dc.title | Natural in ation with a periodic non-minimal coupling to gravity | eng |
dc.type | info:eu-repo/semantics/bachelorThesis | ca |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | ca |
Appears in Collections: | Treballs Finals de Grau (TFG) - Física |
Files in This Item:
File | Description | Size | Format | |
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Simeon Miquel Guillem.pdf | 464.18 kB | Adobe PDF | View/Open |
This item is licensed under a Creative Commons License