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Search for keV-scale sterile neutrinos with the first KATRIN data
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SYSNO ASEP 0577587 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Search for keV-scale sterile neutrinos with the first KATRIN data Author(s) Aker, M. (DE)
Batzler, D. (DE)
Beglarian, A. (DE)
Behrens, J. (DE)
Dragoun, Otokar (UJF-V) RID, SAI
Kovalík, Alojz (UJF-V) RID, ORCID, SAI
Lebeda, Ondřej (UJF-V) RID, ORCID, SAI
Ráliš, Jan (UJF-V) SAI
Ryšavý, Miloš (UJF-V) RID, ORCID, SAI
Šefčík, Michal (UJF-V) ORCID, SAI
Vénos, Drahoslav (UJF-V) RID, SAI, ORCIDNumber of authors 130 Article number 763 Source Title European Physical Journal C. - : Springer - ISSN 1434-6044
Roč. 83, č. 8 (2023)Number of pages 12 s. Publication form Print - P Language eng - English Country US - United States Keywords KATRIN experiment ; sterile neutrino ; keV-scale OECD category Particles and field physics R&D Projects LTT19005 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support UJF-V - RVO:61389005 UT WOS 001062421500009 EID SCOPUS 85169159426 DOI 10.1140/epjc/s10052-023-11818-y Annotation In this work we present a keV-scale sterile-neutrino search with a low-tritium-activity data set of the KATRIN experiment, acquired in a commissioning run in 2018. KATRIN performs a spectroscopic measurement of the tritium beta-decay spectrum with the main goal of directly determining the effective electron anti-neutrino mass. During this commissioning phase a lower tritium activity facilitated the measurement of a wider part of the tritium spectrum and thus the search for sterile neutrinos with a mass of up to 1.6 keV. We do not find a signal and set an exclusion limit on the sterile-to-active mixing amplitude of sin(2) theta < 5 x 10(-4) (95% C.L.) at a mass of 0.3 keV. This result improves current laboratory-based bounds in the sterile-neutrino mass range between 0.1 and 1.0 keV. Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2024 Electronic address https://doi.org/10.1140/epjc/s10052-023-11818-y
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