| 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 |
|