Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/132841
Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Germani, Cristiano | - |
dc.contributor.author | Kehagias, Alex | - |
dc.date.accessioned | 2019-05-08T13:00:41Z | - |
dc.date.available | 2019-05-08T13:00:41Z | - |
dc.date.issued | 2011-04-20 | - |
dc.identifier.issn | 0031-9007 | - |
dc.identifier.uri | http://hdl.handle.net/2445/132841 | - |
dc.description.abstract | In natural inflation, the inflaton is a pseudo-Nambu-Goldstone boson which acquires a mass by explicit breaking of a global shift symmetry at scale f . In this case, for small field values, the potential is flat and stable under radiative corrections. Nevertheless, slow roll conditions enforce f ≫ M p , making the validity of the whole scenario questionable. In this Letter, we show that a coupling of the inflaton kinetic term to the Einstein tensor allows f ≪ M p by enhancing the gravitational friction acting on the inflaton during inflation. This new unique interaction (a) keeps the theory perturbative in the whole inflationary trajectory, (b) preserves the tree-level shift invariance of the pseudo-Nambu-Goldstone boson, and (c) avoids the introduction of any new degrees of freedom with respect to standard natural inflation. | - |
dc.format.extent | 4 p. | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | American Physical Society | - |
dc.relation.isformatof | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.106.161302 | - |
dc.relation.ispartof | Physical Review Letters, 2011, vol. 106, num. 16, p. 161302 | - |
dc.relation.uri | https://doi.org/10.1103/PhysRevLett.106.161302 | - |
dc.rights | (c) American Physical Society, 2011 | - |
dc.source | Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) | - |
dc.subject.classification | Radiació ultraviolada | - |
dc.subject.classification | Bosons | - |
dc.subject.other | Ultraviolet radiation | - |
dc.subject.other | Bosons | - |
dc.title | Ultraviolet-Protected Inflation | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 660017 | - |
dc.date.updated | 2019-05-08T13:00:41Z | - |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
660017.pdf | 108.55 kB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.