Results of the search for neutrinoless double-beta decay in Mo-100 with the NEMO-3 experiment

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F15%3A10320312" target="_blank" >RIV/00216208:11320/15:10320312 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1103/PhysRevD.92.072011" target="_blank" >http://dx.doi.org/10.1103/PhysRevD.92.072011</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevD.92.072011" target="_blank" >10.1103/PhysRevD.92.072011</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Results of the search for neutrinoless double-beta decay in Mo-100 with the NEMO-3 experiment

Popis výsledku v původním jazyce

The NEMO-3 detector, which had been operating in the Modane Underground Laboratory from 2003 to 2010, was designed to search for neutrinoless double-beta (0 nu beta beta) decay. We report the final results of a search for 0 nu beta beta decays with 6.914kg of Mo-100 using the entire NEMO-3 data set with a detector live time of 4.96 yr, which corresponds to an exposure of 34.3 kg . yr. We perform a detailed study of the expected background in the 0 nu beta beta signal region and find no evidence of 0 nubeta beta decays in the data. The level of observed background in the 0 nu beta beta signal region [2.8-3.2] MeV is 0.44 +/- 0.13 counts/yr/kg, and no events are observed in the interval [3.2-10] MeV. We therefore derive a lower limit on the half-life of 0 nu beta beta decays in Mo-100 of T-1/2(0 nu beta beta) > 1.1 x 10(24) yr at the 90% confidence level, under the hypothesis of decay kinematics similar to that for light Majorana neutrino exchange. Depending on the model used for calcu

Název v anglickém jazyce

Results of the search for neutrinoless double-beta decay in Mo-100 with the NEMO-3 experiment

Popis výsledku anglicky

The NEMO-3 detector, which had been operating in the Modane Underground Laboratory from 2003 to 2010, was designed to search for neutrinoless double-beta (0 nu beta beta) decay. We report the final results of a search for 0 nu beta beta decays with 6.914kg of Mo-100 using the entire NEMO-3 data set with a detector live time of 4.96 yr, which corresponds to an exposure of 34.3 kg . yr. We perform a detailed study of the expected background in the 0 nu beta beta signal region and find no evidence of 0 nubeta beta decays in the data. The level of observed background in the 0 nu beta beta signal region [2.8-3.2] MeV is 0.44 +/- 0.13 counts/yr/kg, and no events are observed in the interval [3.2-10] MeV. We therefore derive a lower limit on the half-life of 0 nu beta beta decays in Mo-100 of T-1/2(0 nu beta beta) > 1.1 x 10(24) yr at the 90% confidence level, under the hypothesis of decay kinematics similar to that for light Majorana neutrino exchange. Depending on the model used for calcu

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BF - Elementární částice a fyzika vysokých energií

OECD FORD obor

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Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název periodika

Physical Review D - Particles, Fields, Gravitation and Cosmology

ISSN

1550-7998

e-ISSN

—

Svazek periodika

92

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

23

Strana od-do

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Kód UT WoS článku

000363237400002

EID výsledku v databázi Scopus

2-s2.0-84945370746