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| dc.contributor | Notari, Alessio | |
| dc.creator | Simeon Miquel, Guillem | |
| dc.date | 2018-10-10T12:43:23Z | |
| dc.date | 2018-10-10T12:43:23Z | |
| dc.date | 2018-06 | |
| dc.date.accessioned | 2024-12-16T10:26:50Z | |
| dc.date.available | 2024-12-16T10:26:50Z | |
| dc.identifier | http://hdl.handle.net/2445/125262 | |
| dc.identifier.uri | http://fima-docencia.ub.edu:8080/xmlui/handle/123456789/21575 | |
| dc.description | Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Curs: 2018, Tutor: Alessio Notari | |
| dc.description | 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 | |
| dc.format | 5 p. | |
| dc.format | application/pdf | |
| dc.language | eng | |
| dc.rights | cc-by-nc-nd (c) Simeon, 2018 | |
| dc.rights | http://creativecommons.org/licenses/by-nc-nd/3.0/es/ | |
| dc.rights | info:eu-repo/semantics/openAccess | |
| dc.source | Treballs Finals de Grau (TFG) - Física | |
| dc.subject | Expansió de l'univers | |
| dc.subject | Relativitat general (Física) | |
| dc.subject | Treballs de fi de grau | |
| dc.subject | Expanding universe | |
| dc.subject | General relativity (Physics) | |
| dc.subject | Bachelor's theses | |
| dc.title | Natural in ation with a periodic non-minimal coupling to gravity | |
| dc.type | info:eu-repo/semantics/bachelorThesis |
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