Improved Upper Limit on the Neutrino Mass from a Direct Kinematic Method by KATRIN
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F19%3A00518405" target="_blank" >RIV/61389005:_____/19:00518405 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1103/PhysRevLett.123.221802" target="_blank" >https://doi.org/10.1103/PhysRevLett.123.221802</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevLett.123.221802" target="_blank" >10.1103/PhysRevLett.123.221802</a>
Alternative languages
Result language
angličtina
Original language name
Improved Upper Limit on the Neutrino Mass from a Direct Kinematic Method by KATRIN
Original language description
We report on the neutrino mass measurement result from the first four-week science run of the Karlsruhe Tritium Neutrino experiment KATRIN in spring 2019. Beta-decay electrons from a high-purity gaseous molecular tritium source are energy analyzed by a high-resolution MAC-E filter. A fit of the integrated electron spectrum over a narrow interval around the kinematic end point at 18.57 keV gives an effective neutrino mass square value of (-1.0(-1.1)(+0.9)) eV(2). From this, we derive an upper limit of 1.1 eV (90% confidence level) on the absolute mass scale of neutrinos. This value coincides with the KATRIN sensitivity. It improves upon previous mass limits from kinematic measurements by almost a factor of 2 and provides model-independent input to cosmological studies of structure formation.
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
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2019
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 Letters
ISSN
0031-9007
e-ISSN
—
Volume of the periodical
123
Issue of the periodical within the volume
22
Country of publishing house
US - UNITED STATES
Number of pages
10
Pages from-to
221802
UT code for WoS article
000499986000003
EID of the result in the Scopus database
2-s2.0-85076422968