Measurement of the 2 nu beta beta decay half-life of Nd-150 and a search for 0 nu beta beta decay processes with the full exposure from the NEMO-3 detector

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F16%3A10335340" target="_blank" >RIV/00216208:11320/16:10335340 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21340/16:00303964 RIV/68407700:21670/16:00303964

Výsledek na webu

<a href="http://dx.doi.org/10.1103/PhysRevD.94.072003" target="_blank" >http://dx.doi.org/10.1103/PhysRevD.94.072003</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevD.94.072003" target="_blank" >10.1103/PhysRevD.94.072003</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Measurement of the 2 nu beta beta decay half-life of Nd-150 and a search for 0 nu beta beta decay processes with the full exposure from the NEMO-3 detector

Popis výsledku v původním jazyce

We present results from a search for neutrinoless double-beta (0 nu beta beta) decay using 36.6 g of the isotope Nd-150 with data corresponding to a live time of 5.25 y recorded with the NEMO-3 detector. We construct a complete background model for this isotope, including a measurement of the two-neutrino double-beta decay half-life of T-1/2(2 nu) = [9.34 +/- 0.22(stat)(-0.60)(+0.62)(syst)] x 10(18) y for the ground state transition, which represents the most precise result to date for this isotope. We perform a multivariate analysis to search for 0 nu beta beta decays in order to improve the sensitivity and, in the case of observation, disentangle the possible underlying decay mechanisms. As no evidence for 0 nu beta beta decay is observed, we derive lower limits on half-lives for several mechanisms involving physics beyond the standard model. The observed lower limit, assuming light Majorana neutrino exchange mediates the decay, is T-1/2(0 nu) > 2 > 2.0 x 10(22) y at the 90% C.L., corresponding to an upper limit on the effective neutrino mass of < m(nu)> < 1.6-5.3 eV.

Název v anglickém jazyce

Measurement of the 2 nu beta beta decay half-life of Nd-150 and a search for 0 nu beta beta decay processes with the full exposure from the NEMO-3 detector

Popis výsledku anglicky

We present results from a search for neutrinoless double-beta (0 nu beta beta) decay using 36.6 g of the isotope Nd-150 with data corresponding to a live time of 5.25 y recorded with the NEMO-3 detector. We construct a complete background model for this isotope, including a measurement of the two-neutrino double-beta decay half-life of T-1/2(2 nu) = [9.34 +/- 0.22(stat)(-0.60)(+0.62)(syst)] x 10(18) y for the ground state transition, which represents the most precise result to date for this isotope. We perform a multivariate analysis to search for 0 nu beta beta decays in order to improve the sensitivity and, in the case of observation, disentangle the possible underlying decay mechanisms. As no evidence for 0 nu beta beta decay is observed, we derive lower limits on half-lives for several mechanisms involving physics beyond the standard model. The observed lower limit, assuming light Majorana neutrino exchange mediates the decay, is T-1/2(0 nu) > 2 > 2.0 x 10(22) y at the 90% C.L., corresponding to an upper limit on the effective neutrino mass of < m(nu)> < 1.6-5.3 eV.

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

<a href="/cs/project/LG14003" target="_blank" >LG14003: Neurychlovačová astročásticová fyzika v podzemní laboratoři LSM (Franice)</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

PHYSICAL REVIEW D

ISSN

2470-0010

e-ISSN

—

Svazek periodika

94

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

19

Strana od-do

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Kód UT WoS článku

000385632000002

EID výsledku v databázi Scopus

2-s2.0-84991693277