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dc.contributor.authorKaram, Alexandros
dc.contributor.authorMarkkanen, Tommi
dc.contributor.authorMarzola, Luca
dc.contributor.authorNurmi, Sami
dc.contributor.authorRaidal, Martti
dc.contributor.authorRajantie, Arttu
dc.date.accessioned2021-07-16T10:29:25Z
dc.date.available2021-07-16T10:29:25Z
dc.date.issued2021
dc.identifier.citationKaram, A., Markkanen, T., Marzola, L., Nurmi, S., Raidal, M., & Rajantie, A. (2021). Higgs-like spectator field as the origin of structure. <i>European Physical Journal C</i>, <i>81</i>(7), Article 620. <a href="https://doi.org/10.1140/epjc/s10052-021-09417-w" target="_blank">https://doi.org/10.1140/epjc/s10052-021-09417-w</a>
dc.identifier.otherCONVID_99039558
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/77169
dc.description.abstractWe show that the observed primordial perturbations can be entirely sourced by a light spectator scalar field with a quartic potential, akin to the Higgs boson, provided that the field is sufficiently displaced from vacuum during inflation. The framework relies on the indirect modulation of reheating, which is implemented without any direct coupling between the spectator field and the inflaton and does not require non-renormalisable interactions. The scenario gives rise to local non-Gaussianity with fNL≃5 as the typical signal. As an example model where the indirect modulation mechanism is realised for the Higgs boson, we study the Standard Model extended with right-handed neutrinos. For the Standard Model running we find, however, that the scenario analysed does not seem to produce the observed perturbation.en
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.publisherSpringer Science and Business Media LLC
dc.relation.ispartofseriesEuropean Physical Journal C
dc.rightsCC BY 4.0
dc.titleHiggs-like spectator field as the origin of structure
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-202107164344
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.description.reviewstatuspeerReviewed
dc.relation.issn1434-6044
dc.relation.numberinseries7
dc.relation.volume81
dc.type.versionpublishedVersion
dc.rights.copyright© The Author(s) 2021
dc.rights.accesslevelopenAccessfi
dc.subject.ysokosminen taustasäteily
dc.subject.ysokosminen inflaatio
dc.subject.ysohiukkasfysiikan standardimalli
dc.subject.ysoHiggsin bosoni
dc.subject.ysokosmologia
dc.format.contentfulltext
jyx.subject.urihttp://www.yso.fi/onto/yso/p8188
jyx.subject.urihttp://www.yso.fi/onto/yso/p27805
jyx.subject.urihttp://www.yso.fi/onto/yso/p27292
jyx.subject.urihttp://www.yso.fi/onto/yso/p27401
jyx.subject.urihttp://www.yso.fi/onto/yso/p7160
dc.rights.urlhttps://creativecommons.org/licenses/by/4.0/
dc.relation.doi10.1140/epjc/s10052-021-09417-w
jyx.fundinginformationThis work was supported by the EU Marie Curie grant 786564, the European Regional Development Fund through the CoE program grant TK133, the Mobilitas Pluss grants MOBTT5, MOBTT86, and the Estonian Research Council grants PRG356, PRG1055 and PRG803. A.R. was supported by the U.K. Science and Technology Facilities Council grants ST/P000762/1 and ST/T000791/1 and Institute for Particle Physics Phenomenology Associateship.


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