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dc.contributor.authorKostensalo, Joel
dc.contributor.authorSuhonen, Jouni
dc.contributor.editorCivitarese, Osvaldo
dc.contributor.editorStekl, Ivan
dc.contributor.editorSuhonen, Jouni
dc.date.accessioned2019-11-05T13:46:36Z
dc.date.available2019-11-05T13:46:36Z
dc.date.issued2019
dc.identifier.citationKostensalo, J., & Suhonen, J. (2019). Anomalies and sterile neutrinos : Implications of new theoretical results. In O. Civitarese, I. Stekl, & J. Suhonen (Eds.), <i>MEDEX’19 : Workshop on Calculation of Double-Beta-Decay Matrix Elements</i> (Article 020016). American Institute of Physics. AIP Conference Proceedings, 2165. <a href="https://doi.org/10.1063/1.5130977" target="_blank">https://doi.org/10.1063/1.5130977</a>
dc.identifier.otherCONVID_33378152
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/66185
dc.description.abstractThe reactor antineutrino and the gallium anomalies have been long unexplained. Possible explanations for both of these anomalies include new physics, such as the existence of one or more eV-scale sterile neutrino. However, the previous theoretical calculations, which do not replicate the experimental results, rely on many simplifying approximations. We have performed shell model calculations in order to gain insights into these issues. In the reactor-antineutrino analysis the beta decays contributing to the cumulative electron spectrum are usually assumed to have allowed spectral shapes. However, many of these decays are actually first-forbidden. Moreover, these decays dominate the experimentally observable region. Based on the recent results, the use of this allowed approximation can at least partially explain the so called reactor antineurtino anomaly. Our new large-scale shell model calculations regarding the neutrino-nucleus scattering cross section off 71Ga decreases the gap between theory and the experimental results of GALLEX and SAGE experiments. Conflict between charge-exchange BGTs and the neutrino-nucleus cross sections can to some extent be explained by destructive interference between Gamow-Teller and tensor contributions.en
dc.format.mimetypeapplication/pdf
dc.languageeng
dc.language.isoeng
dc.publisherAmerican Institute of Physics
dc.relation.ispartofMEDEX’19 : Workshop on Calculation of Double-Beta-Decay Matrix Elements
dc.relation.ispartofseriesAIP Conference Proceedings
dc.rightsIn Copyright
dc.titleAnomalies and sterile neutrinos : Implications of new theoretical results
dc.typeconferenceObject
dc.identifier.urnURN:NBN:fi:jyu-201911054734
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.type.urihttp://purl.org/eprint/type/ConferencePaper
dc.relation.isbn978-0-7354-1910-0
dc.description.reviewstatuspeerReviewed
dc.relation.issn0094-243X
dc.type.versionpublishedVersion
dc.rights.copyright© 2019 Author(s)
dc.rights.accesslevelopenAccessfi
dc.relation.conferenceWorkshop on Calculation of Double-Beta-Decay Matrix Elements
dc.relation.grantnumber318043
dc.subject.ysoneutriinot
dc.subject.ysohiukkasfysiikka
dc.subject.ysoydinfysiikka
dc.format.contentfulltext
jyx.subject.urihttp://www.yso.fi/onto/yso/p5219
jyx.subject.urihttp://www.yso.fi/onto/yso/p15576
jyx.subject.urihttp://www.yso.fi/onto/yso/p14759
dc.rights.urlhttp://rightsstatements.org/page/InC/1.0/?language=en
dc.relation.doi10.1063/1.5130977
dc.relation.funderSuomen Akatemiafi
dc.relation.funderAcademy of Finlanden
jyx.fundingprogramAkatemiahanke, SAfi
jyx.fundingprogramAcademy Project, AoFen
jyx.fundinginformationThis work has been partially supported by the Academy of Finland under the Academy project no. 318043. J. K. acknowledges the financial support from Jenny and Antti Wihuri Foundation.


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