dc.contributor.author | Bastero Gil, Mar | |
dc.contributor.author | Berera, Arjun | |
dc.contributor.author | Ramos, Rudnei O. | |
dc.contributor.author | Rosa, João G. | |
dc.date.accessioned | 2021-03-15T11:33:15Z | |
dc.date.available | 2021-03-15T11:33:15Z | |
dc.date.issued | 2020-12-29 | |
dc.identifier.citation | Bastero-Gil, M., Berera, A., Ramos, R. O., & Rosa, J. G. (2020). Towards a reliable effective field theory of inflation. Physics Letters B, 136055. [https://doi.org/10.1016/j.physletb.2020.136055] | es_ES |
dc.identifier.uri | http://hdl.handle.net/10481/67227 | |
dc.description.abstract | We present the first quantum field theory model of inflation that is renormalizable in the matter sector, with a super-Hubble inflaton mass and sub-Planckian field excursions, which is thus technically natural and consistent with a high-energy completion within a theory of quantum gravity. This is done in the framework of warm inflation, where we show, for the first time, that strong dissipation can fully sustain a slow-roll trajectory with slow-roll parameters larger than unity in a way that is both theoretically and observationally consistent. The inflaton field corresponds to the relative phase between two complex scalar fields that collectively break a U(1)gauge symmetry, and dissipates its energy into scalar degrees of freedom in the warm cosmic heat bath. A discrete interchange symmetry protects the inflaton mass from large thermal corrections. We further show that the dissipation coefficient decreases with temperature in certain parametric regimes, which prevents a large growth of thermal inflaton fluctuations. We find, in particular, a very good agreement with the Planck legacy data for a simple quadratic inflaton potential, predicting a low tensor-to-scalar ratio r 10−5. | es_ES |
dc.description.sponsorship | UK Research & Innovation (UKRI)
Science & Technology Facilities Council (STFC) | es_ES |
dc.description.sponsorship | MINECO
FIS2016-78198-P | es_ES |
dc.description.sponsorship | Junta de Andalucía
SOMM/17/6104/UGR
FQM101 | es_ES |
dc.description.sponsorship | National Council for Scientific and Technological Development (CNPq)
302545/2017-4 | es_ES |
dc.description.sponsorship | Carlos Chagas Filho Foundation for Research Support of the State of Rio de Janeiro (FAPERJ)
E-26/202.892/2017 | es_ES |
dc.description.sponsorship | Portuguese Foundation for Science and Technology
European Commission
IF/01597/2015
PTDC/FIS-OUT/28407/2017 | es_ES |
dc.description.sponsorship | CFisUC strategic project
UID/FIS/04564/2019 | es_ES |
dc.description.sponsorship | ENGAGE SKA
POCI-01-0145-FEDER-022217 | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | Elsevier | es_ES |
dc.rights | Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License | es_ES |
dc.rights | Atribución 3.0 España | * |
dc.rights.uri | http://creativecommons.org/licenses/by/3.0/es/ | * |
dc.title | Towards a reliable effective field theory of inflation | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | es_ES |
dc.identifier.doi | 10.1016/j.physletb.2020.136055 | |
dc.type.hasVersion | info:eu-repo/semantics/publishedVersion | es_ES |