Number of the records: 1
Analysis methods for the first KATRIN neutrino-mass measurement
- 1.
SYSNO ASEP 0544123 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Analysis methods for the first KATRIN neutrino-mass measurement Author(s) Aker, M. (DE)
Altenmuller, K. (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
Ryšavý, Miloš (UJF-V) RID, ORCID, SAI
Šefčík, Michal (UJF-V) ORCID, SAI
Vénos, Drahoslav (UJF-V) RID, SAI, ORCIDNumber of authors 129 Article number 012005 Source Title Physical Review D. - : American Physical Society - ISSN 2470-0010
Roč. 104, č. 1 (2021)Number of pages 36 s. Publication form Print - P Language eng - English Country US - United States Keywords KATRIN ; neutrino mass ; beta-decay Subject RIV BF - Elementary Particles and High Energy Physics OECD category Particles and field physics R&D Projects LTT19005 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Research Infrastructure CANAM II - 90056 - Ústav jaderné fyziky AV ČR, v. v. i. Method of publishing Open access Institutional support UJF-V - RVO:61389005 UT WOS 000672781100001 EID SCOPUS 85110335657 DOI 10.1103/PhysRevD.104.012005 Annotation We report on the dataset, data handling, and detailed analysis techniques of the first neutrino-mass measurement by the Karlsruhe Tritium Neutrino (KATRIN) experiment, which probes the absolute neutrino-mass scale via the beta-decay kinematics of molecular tritium. The source is highly pure, cryogenic T-2 gas. The beta electrons are guided along magnetic field lines toward a high-resolution, integrating spectrometer for energy analysis. A silicon detector counts beta electrons above the energy threshold of the spectrometer, so that a scan of the thresholds produces a precise measurement of the high-energy spectral tail. After detailed theoretical studies, simulations, and commissioning measurements, extending from the molecular final-state distribution to inelastic scattering in the source to subtleties of the electromagnetic fields, our independent, blind analyses allow us to set an upper limit of 1.1 eVon the neutrino-mass scale at a 90% confidence level. This first result, based on a few weeks of running at a reduced source intensity and dominated by statistical uncertainty, improves on prior limits by nearly a factor of two. This result establishes an analysis framework for future KATRIN measurements, and provides important input to both particle theory and cosmology. Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2022 Electronic address https://doi.org/10.1103/PhysRevD.104.012005
Number of the records: 1