The hand-made tail: Non-perturbative tails from multifield inflation

It is becoming increasingly clear that large but rare fluctuations of the primordial curvature field, controlled by the tail of its probability distribution, could have dramatic effects on the current structure of the universe — e.g. via primordial black-holes. However, the use of standard perturbat...

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Detalles Bibliográficos
Autores: Achúcarro, Ana, Cespedés Castillo, Sebastián Miguel, Davis, Anne-Christine, Palma, Gonzalo A.
Tipo de recurso: artículo
Fecha de publicación:2022
País:España
Institución:Universidad Autónoma de Madrid
Repositorio:Biblos-e Archivo. Repositorio Institucional de la UAM
Idioma:inglés
OAI Identifier:oai:repositorio.uam.es:10486/707287
Acceso en línea:http://hdl.handle.net/10486/707287
https://dx.doi.org/10.1007/JHEP05(2022)052
Access Level:acceso abierto
Palabra clave:Inflation
Supergravity
Cosmos
Física
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spelling The hand-made tail: Non-perturbative tails from multifield inflationAchúcarro, AnaCespedés Castillo, Sebastián MiguelDavis, Anne-ChristinePalma, Gonzalo A.InflationSupergravityCosmosFísicaIt is becoming increasingly clear that large but rare fluctuations of the primordial curvature field, controlled by the tail of its probability distribution, could have dramatic effects on the current structure of the universe — e.g. via primordial black-holes. However, the use of standard perturbation theory to study the evolution of fluctuations during inflation fails in providing a reliable description of how non-linear interactions induce non-Gaussian tails. Here, we use the stochastic inflation formalism to study the non-perturbative effects from multi-field fluctuations on the statistical properties of the primordial curvature field. Starting from the effective action describing multi-field fluctuations, we compute the joint probability density function and show that enhanced non-Gaussian tails are a generic feature of slow-roll inflation with additional degrees of freedomThe work of SC has been funded by a Contrato de Atracción de Talento (Modalidad 1) de la Comunidad de Madrid (Spain), number 2017- T1/TIC-5520 and the IFT Centro de Excelencia Severo Ochoa Grant SEV-2016-0597. ACD acknowledges partial support from STFC consolidated grant ST/T000694/1. AA’s work is partially supported by the Netherlands Organization for Scientific Research (N.W.O), by the Basque Government (IT-979-16) and by the Spanish Ministry MINECO (FPA2015- 64041-C2-1P)SpringerDepartamento de Física TeóricaFacultad de Ciencias20222022-05-01research articlehttp://purl.org/coar/resource_type/c_2df8fbb1VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10486/707287https://dx.doi.org/10.1007/JHEP05(2022)052reponame:Biblos-e Archivo. Repositorio Institucional de la UAMinstname:Universidad Autónoma de MadridInglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:repositorio.uam.es:10486/7072872026-06-23T12:46:27Z
dc.title.none.fl_str_mv The hand-made tail: Non-perturbative tails from multifield inflation
title The hand-made tail: Non-perturbative tails from multifield inflation
spellingShingle The hand-made tail: Non-perturbative tails from multifield inflation
Achúcarro, Ana
Inflation
Supergravity
Cosmos
Física
title_short The hand-made tail: Non-perturbative tails from multifield inflation
title_full The hand-made tail: Non-perturbative tails from multifield inflation
title_fullStr The hand-made tail: Non-perturbative tails from multifield inflation
title_full_unstemmed The hand-made tail: Non-perturbative tails from multifield inflation
title_sort The hand-made tail: Non-perturbative tails from multifield inflation
dc.creator.none.fl_str_mv Achúcarro, Ana
Cespedés Castillo, Sebastián Miguel
Davis, Anne-Christine
Palma, Gonzalo A.
author Achúcarro, Ana
author_facet Achúcarro, Ana
Cespedés Castillo, Sebastián Miguel
Davis, Anne-Christine
Palma, Gonzalo A.
author_role author
author2 Cespedés Castillo, Sebastián Miguel
Davis, Anne-Christine
Palma, Gonzalo A.
author2_role author
author
author
dc.contributor.none.fl_str_mv Departamento de Física Teórica
Facultad de Ciencias
dc.subject.none.fl_str_mv Inflation
Supergravity
Cosmos
Física
topic Inflation
Supergravity
Cosmos
Física
description It is becoming increasingly clear that large but rare fluctuations of the primordial curvature field, controlled by the tail of its probability distribution, could have dramatic effects on the current structure of the universe — e.g. via primordial black-holes. However, the use of standard perturbation theory to study the evolution of fluctuations during inflation fails in providing a reliable description of how non-linear interactions induce non-Gaussian tails. Here, we use the stochastic inflation formalism to study the non-perturbative effects from multi-field fluctuations on the statistical properties of the primordial curvature field. Starting from the effective action describing multi-field fluctuations, we compute the joint probability density function and show that enhanced non-Gaussian tails are a generic feature of slow-roll inflation with additional degrees of freedom
publishDate 2022
dc.date.none.fl_str_mv 2022
2022-05-01
dc.type.none.fl_str_mv research article
http://purl.org/coar/resource_type/c_2df8fbb1
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10486/707287
https://dx.doi.org/10.1007/JHEP05(2022)052
url http://hdl.handle.net/10486/707287
https://dx.doi.org/10.1007/JHEP05(2022)052
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
dc.source.none.fl_str_mv reponame:Biblos-e Archivo. Repositorio Institucional de la UAM
instname:Universidad Autónoma de Madrid
instname_str Universidad Autónoma de Madrid
reponame_str Biblos-e Archivo. Repositorio Institucional de la UAM
collection Biblos-e Archivo. Repositorio Institucional de la UAM
repository.name.fl_str_mv
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