Bound on 3+1 Active-Sterile Neutrino Mixing from the First Four-Week Science Run of KATRIN

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F21%3A00541437" target="_blank" >RIV/61389005:_____/21:00541437 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1103/PhysRevLett.126.091803" target="_blank" >https://doi.org/10.1103/PhysRevLett.126.091803</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevLett.126.091803" target="_blank" >10.1103/PhysRevLett.126.091803</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Bound on 3+1 Active-Sterile Neutrino Mixing from the First Four-Week Science Run of KATRIN

Popis výsledku v původním jazyce

We report on the light sterile neutrino search from the first four-week science run of the KATRIN experiment in 2019. Beta-decay electrons from a high-purity gaseous molecular tritium source are analyzed by a high-resolution MAC-E filter down to 40 eV below the endpoint at 18.57 keV. We consider the framework with three active neutrinos and one sterile neutrino. The analysis is sensitive to the mass, m(4), of the fourth mass state for m(4)(2) less than or similar to 1000 eV(2) and to active-to-sterile neutrino mixing down to vertical bar U-e4 vertical bar greater than or similar to 2 x 10(-2). No significant spectral distortion is observed and exclusion bounds on the sterile mass and mixing are reported. These new limits supersede the Mainz results for m(4)(2) less than or similar to 1000 eV(2) and improve the Troitsk bound for m(4)(2) < 30 eV(2). The reactor and gallium anomalies are constrained for 100 < Delta m(41)(2) < 1000 eV(2).

Název v anglickém jazyce

Bound on 3+1 Active-Sterile Neutrino Mixing from the First Four-Week Science Run of KATRIN

Popis výsledku anglicky

We report on the light sterile neutrino search from the first four-week science run of the KATRIN experiment in 2019. Beta-decay electrons from a high-purity gaseous molecular tritium source are analyzed by a high-resolution MAC-E filter down to 40 eV below the endpoint at 18.57 keV. We consider the framework with three active neutrinos and one sterile neutrino. The analysis is sensitive to the mass, m(4), of the fourth mass state for m(4)(2) less than or similar to 1000 eV(2) and to active-to-sterile neutrino mixing down to vertical bar U-e4 vertical bar greater than or similar to 2 x 10(-2). No significant spectral distortion is observed and exclusion bounds on the sterile mass and mixing are reported. These new limits supersede the Mainz results for m(4)(2) less than or similar to 1000 eV(2) and improve the Troitsk bound for m(4)(2) < 30 eV(2). The reactor and gallium anomalies are constrained for 100 < Delta m(41)(2) < 1000 eV(2).

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20305 - Nuclear related engineering; (nuclear physics to be 1.3);

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Physical Review Letters

ISSN

0031-9007

e-ISSN

1079-7114

Svazek periodika

126

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

091803

Kód UT WoS článku

000627618200006

EID výsledku v databázi Scopus

2-s2.0-85102174835