Warm little inflaton

Detalhes bibliográficos
Autor(a) principal: Bastero-Gil, Mar
Data de Publicação: 2016
Outros Autores: Berera, Arjun, Ramos, Rudnei O., Rosa, João G.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10773/16634
Resumo: We show that inflation can naturally occur at a finite temperature T>H that is sustained by dissipative effects, when the inflaton field corresponds to a pseudo Nambu-Goldstone boson of a broken gauge symmetry. Similar to the Little Higgs scenarios for electroweak symmetry breaking, the flatness of the inflaton potential is protected against both quadratic divergences and the leading thermal corrections. We show that, nevertheless, nonlocal dissipative effects are naturally present and are able to sustain a nearly thermal bath of light particles despite the accelerated expansion of the Universe. As an example, we discuss the dynamics of chaotic warm inflation with a quartic potential and show that the associated observational predictions are in very good agreement with the latest Planck results. This model constitutes the first realization of warm inflation requiring only a small number of fields; in particular, the inflaton is directly coupled to just two light fields.
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spelling Warm little inflatonInflationDissipationLittle HiggsWe show that inflation can naturally occur at a finite temperature T>H that is sustained by dissipative effects, when the inflaton field corresponds to a pseudo Nambu-Goldstone boson of a broken gauge symmetry. Similar to the Little Higgs scenarios for electroweak symmetry breaking, the flatness of the inflaton potential is protected against both quadratic divergences and the leading thermal corrections. We show that, nevertheless, nonlocal dissipative effects are naturally present and are able to sustain a nearly thermal bath of light particles despite the accelerated expansion of the Universe. As an example, we discuss the dynamics of chaotic warm inflation with a quartic potential and show that the associated observational predictions are in very good agreement with the latest Planck results. This model constitutes the first realization of warm inflation requiring only a small number of fields; in particular, the inflaton is directly coupled to just two light fields.American Physical Society2017-01-10T13:50:42Z2016-10-04T00:00:00Z2016-10-04info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10773/16634eng0031-900710.1103/PhysRevLett.117.151301Bastero-Gil, MarBerera, ArjunRamos, Rudnei O.Rosa, João G.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-02-22T11:31:11Zoai:ria.ua.pt:10773/16634Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T02:51:46.035434Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Warm little inflaton
title Warm little inflaton
spellingShingle Warm little inflaton
Bastero-Gil, Mar
Inflation
Dissipation
Little Higgs
title_short Warm little inflaton
title_full Warm little inflaton
title_fullStr Warm little inflaton
title_full_unstemmed Warm little inflaton
title_sort Warm little inflaton
author Bastero-Gil, Mar
author_facet Bastero-Gil, Mar
Berera, Arjun
Ramos, Rudnei O.
Rosa, João G.
author_role author
author2 Berera, Arjun
Ramos, Rudnei O.
Rosa, João G.
author2_role author
author
author
dc.contributor.author.fl_str_mv Bastero-Gil, Mar
Berera, Arjun
Ramos, Rudnei O.
Rosa, João G.
dc.subject.por.fl_str_mv Inflation
Dissipation
Little Higgs
topic Inflation
Dissipation
Little Higgs
description We show that inflation can naturally occur at a finite temperature T>H that is sustained by dissipative effects, when the inflaton field corresponds to a pseudo Nambu-Goldstone boson of a broken gauge symmetry. Similar to the Little Higgs scenarios for electroweak symmetry breaking, the flatness of the inflaton potential is protected against both quadratic divergences and the leading thermal corrections. We show that, nevertheless, nonlocal dissipative effects are naturally present and are able to sustain a nearly thermal bath of light particles despite the accelerated expansion of the Universe. As an example, we discuss the dynamics of chaotic warm inflation with a quartic potential and show that the associated observational predictions are in very good agreement with the latest Planck results. This model constitutes the first realization of warm inflation requiring only a small number of fields; in particular, the inflaton is directly coupled to just two light fields.
publishDate 2016
dc.date.none.fl_str_mv 2016-10-04T00:00:00Z
2016-10-04
2017-01-10T13:50:42Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
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status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10773/16634
url http://hdl.handle.net/10773/16634
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 0031-9007
10.1103/PhysRevLett.117.151301
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dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
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