Search for sterile neutrinos at the DANSS experiment

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21670%2F18%3A00330018" target="_blank" >RIV/68407700:21670/18:00330018 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.physletb.2018.10.038" target="_blank" >http://dx.doi.org/10.1016/j.physletb.2018.10.038</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.physletb.2018.10.038" target="_blank" >10.1016/j.physletb.2018.10.038</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Search for sterile neutrinos at the DANSS experiment

Popis výsledku v původním jazyce

DANSS is a highly segmented 1 m³ plastic scintillator detector. Its 2500 one meter long scintillator strips have a Gd-loaded reflective cover. The DANSS detector is placed under an industrial 3.1 GW(th) reactor of the Kalinin Nuclear Power Plant 350 km NW from Moscow. The distance to the core is varied on-line from 10.7 m to 12.7 m. The reactor building provides about 50 m water-equivalent shielding against the cosmic background. DANSS detects almost 5000 (nu) over tilde (e) per day at the closest position with the cosmic background less than 3%. The inverse beta decay process is used to detect (nu) over tilde (e). Sterile neutrinos are searched for assuming the 4 nu model (3 active and 1 sterile nu). The exclusion area in the Delta m(14)(2), sin(2) 2 theta(14) plane is obtained using a ratio of positron energy spectra collected at different distances. Therefore results do not depend on the shape and normalization of the reactor (nu) over tilde (e) spectrum, as well as on the detector efficiency. Results are based on 966 thousand antineutrino events collected at three different distances from the reactor core. The excluded area covers a wide range of the sterile neutrino parameters up to sin(2) 2 theta(14) < 0.01 in the most sensitive region. (C) 2018 The Authors. Published by Elsevier B.V.

Název v anglickém jazyce

Search for sterile neutrinos at the DANSS experiment

Popis výsledku anglicky

DANSS is a highly segmented 1 m³ plastic scintillator detector. Its 2500 one meter long scintillator strips have a Gd-loaded reflective cover. The DANSS detector is placed under an industrial 3.1 GW(th) reactor of the Kalinin Nuclear Power Plant 350 km NW from Moscow. The distance to the core is varied on-line from 10.7 m to 12.7 m. The reactor building provides about 50 m water-equivalent shielding against the cosmic background. DANSS detects almost 5000 (nu) over tilde (e) per day at the closest position with the cosmic background less than 3%. The inverse beta decay process is used to detect (nu) over tilde (e). Sterile neutrinos are searched for assuming the 4 nu model (3 active and 1 sterile nu). The exclusion area in the Delta m(14)(2), sin(2) 2 theta(14) plane is obtained using a ratio of positron energy spectra collected at different distances. Therefore results do not depend on the shape and normalization of the reactor (nu) over tilde (e) spectrum, as well as on the detector efficiency. Results are based on 966 thousand antineutrino events collected at three different distances from the reactor core. The excluded area covers a wide range of the sterile neutrino parameters up to sin(2) 2 theta(14) < 0.01 in the most sensitive region. (C) 2018 The Authors. Published by Elsevier B.V.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

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

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Physics Letters B

ISSN

0370-2693

e-ISSN

1873-2445

Svazek periodika

787

Číslo periodika v rámci svazku

December

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

56-63

Kód UT WoS článku

000452404100009

EID výsledku v databázi Scopus

2-s2.0-85055659889