Quantum anomalies in string-inspired running vacuum universe: Inflation and axion dark matter

In this letter, we elaborate further on a Cosmological 'Running-Vacuum' type model for the Universe, suggested previously by the authors [1], [2], within the context of a string-inspired effective theory in the presence of a Kalb-Ramond (KR) gravitational axion field which descends from th...

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Autores: Basilakos, Spyros, Mavromatos, Nick E., Solà Peracaula, Joan
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2020
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/178869
Acceso en línea:https://hdl.handle.net/2445/178869
Access Level:acceso abierto
Palabra clave:Relativitat general (Física)
Gravitació
General relativity (Physics)
Gravitation
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spelling Quantum anomalies in string-inspired running vacuum universe: Inflation and axion dark matterBasilakos, SpyrosMavromatos, Nick E.Solà Peracaula, JoanRelativitat general (Física)GravitacióGeneral relativity (Physics)GravitationIn this letter, we elaborate further on a Cosmological 'Running-Vacuum' type model for the Universe, suggested previously by the authors [1], [2], within the context of a string-inspired effective theory in the presence of a Kalb-Ramond (KR) gravitational axion field which descends from the antisymmetric tensor of the massless gravitational string multiplet. In the presence of this field, which has anomalous CP violating interactions with the gravitons, primordial gravitational waves induce gravitational anomalies, which in turn are responsible for the appearance of H^2 and H^4 contributions to the vacuum energy density, these terms being characteristic of generic 'running-vacuum-model (RVM) type', where H is the Hubble parameter. In this work we prove in detail the appearance of the H^4 terms due to gravitational-anomaly-induced condensates in the energy density of the primordial Universe, which can self-consistently induce inflation, and subsequent exit from it, according to the generic features of RVM. We also argue in favour of the robustness of our results, which were derived within an effective low-energy field theory approach, against Ultra Violet completion of the theory. During the radiation and matter-dominated eras, gravitational anomalies cancel, as required for the consistency of the quantum matter/radiation field theory. However, chiral and QCD-axion-type anomalies survive and have important consequences for both cosmic magnetogenesis and axionic dark matter in the Universe. Finally, the stringy RVM scenario presented here predicts quintessence-like dynamical dark energy for the current Universe, which is compatible with the existing fitting analyses of such model against observations.Elsevier B.V.2021202120202021info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion14 p.application/pdfhttps://hdl.handle.net/2445/178869Articles publicats en revistes (Física Quàntica i Astrofísica)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció del document publicat a: https://doi.org/10.1016/j.physletb.2020.135342Physics Letters B, 2020, vol. 803, num. 135342https://doi.org/10.1016/j.physletb.2020.135342cc-by (c) Basilakos, Spyros et al., 2020https://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:recercat.cat:2445/1788692026-05-29T05:05:01Z
dc.title.none.fl_str_mv Quantum anomalies in string-inspired running vacuum universe: Inflation and axion dark matter
title Quantum anomalies in string-inspired running vacuum universe: Inflation and axion dark matter
spellingShingle Quantum anomalies in string-inspired running vacuum universe: Inflation and axion dark matter
Basilakos, Spyros
Relativitat general (Física)
Gravitació
General relativity (Physics)
Gravitation
title_short Quantum anomalies in string-inspired running vacuum universe: Inflation and axion dark matter
title_full Quantum anomalies in string-inspired running vacuum universe: Inflation and axion dark matter
title_fullStr Quantum anomalies in string-inspired running vacuum universe: Inflation and axion dark matter
title_full_unstemmed Quantum anomalies in string-inspired running vacuum universe: Inflation and axion dark matter
title_sort Quantum anomalies in string-inspired running vacuum universe: Inflation and axion dark matter
dc.creator.none.fl_str_mv Basilakos, Spyros
Mavromatos, Nick E.
Solà Peracaula, Joan
author Basilakos, Spyros
author_facet Basilakos, Spyros
Mavromatos, Nick E.
Solà Peracaula, Joan
author_role author
author2 Mavromatos, Nick E.
Solà Peracaula, Joan
author2_role author
author
dc.subject.none.fl_str_mv Relativitat general (Física)
Gravitació
General relativity (Physics)
Gravitation
topic Relativitat general (Física)
Gravitació
General relativity (Physics)
Gravitation
description In this letter, we elaborate further on a Cosmological 'Running-Vacuum' type model for the Universe, suggested previously by the authors [1], [2], within the context of a string-inspired effective theory in the presence of a Kalb-Ramond (KR) gravitational axion field which descends from the antisymmetric tensor of the massless gravitational string multiplet. In the presence of this field, which has anomalous CP violating interactions with the gravitons, primordial gravitational waves induce gravitational anomalies, which in turn are responsible for the appearance of H^2 and H^4 contributions to the vacuum energy density, these terms being characteristic of generic 'running-vacuum-model (RVM) type', where H is the Hubble parameter. In this work we prove in detail the appearance of the H^4 terms due to gravitational-anomaly-induced condensates in the energy density of the primordial Universe, which can self-consistently induce inflation, and subsequent exit from it, according to the generic features of RVM. We also argue in favour of the robustness of our results, which were derived within an effective low-energy field theory approach, against Ultra Violet completion of the theory. During the radiation and matter-dominated eras, gravitational anomalies cancel, as required for the consistency of the quantum matter/radiation field theory. However, chiral and QCD-axion-type anomalies survive and have important consequences for both cosmic magnetogenesis and axionic dark matter in the Universe. Finally, the stringy RVM scenario presented here predicts quintessence-like dynamical dark energy for the current Universe, which is compatible with the existing fitting analyses of such model against observations.
publishDate 2020
dc.date.none.fl_str_mv 2020
2021
2021
2021
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/178869
url https://hdl.handle.net/2445/178869
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1016/j.physletb.2020.135342
Physics Letters B, 2020, vol. 803, num. 135342
https://doi.org/10.1016/j.physletb.2020.135342
dc.rights.none.fl_str_mv cc-by (c) Basilakos, Spyros et al., 2020
https://creativecommons.org/licenses/by/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by (c) Basilakos, Spyros et al., 2020
https://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 14 p.
application/pdf
dc.publisher.none.fl_str_mv Elsevier B.V.
publisher.none.fl_str_mv Elsevier B.V.
dc.source.none.fl_str_mv Articles publicats en revistes (Física Quàntica i Astrofísica)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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