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Authordc.contributor.authorAchúcarro, Ana
Authordc.contributor.authorCéspedes, Sebastián
Authordc.contributor.authorDavis, Anne-Christine
Authordc.contributor.authorPalma Quilodrán, Gonzalo Alejandro
Cita de ítemdc.identifier.citationJHEP 05 (2022) 052es_ES
Abstractdc.description.abstractIt 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.es_ES
Patrocinadordc.description.sponsorshipComision Nacional de Investigacion Cientifica y Tecnologica (CONICYT) CONICYT FONDECYT 1210876 Contrato de Atraccion de Talento (Modalidad 1) de la Comunidad de Madrid (Spain) 2017-T1/TIC-5520 IFT Centro de Excelencia Severo Ochoa Grant SEV-2016-0597 UK Research & Innovation (UKRI) Science & Technology Facilities Council (STFC) ST/T000694/1 Netherlands Organization for Scientific Research (NWO) Basque Government IT-979-16 Spanish Government FPA201564041-C2-1Pes_ES
Type of licensedc.rightsAttribution-NonCommercial-NoDerivs 3.0 United States*
Link to Licensedc.rights.uri*
Sourcedc.sourceJournal of High Energy of Physicses_ES
Keywordsdc.subjectCosmology of theories BSMes_ES
Keywordsdc.subjectEffective field theorieses_ES
Keywordsdc.subjectRenormalization groupes_ES
Títulodc.titleThe hand-made tail: non-perturbative tails from multifield inflationes_ES
Document typedc.typeArtículo de revistaes_ES
dc.description.versiondc.description.versionVersión publicada - versión final del editores_ES
dcterms.accessRightsdcterms.accessRightsAcceso abiertoes_ES
Indexationuchile.indexArtículo de publícación WoSes_ES

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Attribution-NonCommercial-NoDerivs 3.0 United States
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 3.0 United States