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Analysis methods for the first KATRIN neutrino-mass measurement

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F21%3A00544123" target="_blank" >RIV/61389005:_____/21:00544123 - isvavai.cz</a>

  • Result on the web

    <a href="https://doi.org/10.1103/PhysRevD.104.012005" target="_blank" >https://doi.org/10.1103/PhysRevD.104.012005</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1103/PhysRevD.104.012005" target="_blank" >10.1103/PhysRevD.104.012005</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Analysis methods for the first KATRIN neutrino-mass measurement

  • Original language description

    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.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10303 - Particles and field physics

Result continuities

  • Project

    <a href="/en/project/LTT19005" target="_blank" >LTT19005: Czech Participation at the International Experiment KATRIN</a><br>

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2021

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Physical Review D

  • ISSN

    2470-0010

  • e-ISSN

    2470-0029

  • Volume of the periodical

    104

  • Issue of the periodical within the volume

    1

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    36

  • Pages from-to

    012005

  • UT code for WoS article

    000672781100001

  • EID of the result in the Scopus database

    2-s2.0-85110335657