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

Result code in 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>
Alternative codes found
RIV/68407700:21340/16:00303964 RIV/68407700:21670/16:00303964
Result on the web
<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>

Result language
angličtina
Original language name
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
Original language description
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.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BF - Elementary particle theory and high energy physics
OECD FORD branch
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Project
<a href="/en/project/LG14003" target="_blank" >LG14003: Non-accelerator astroparticle physics in the Modane Underground Laboratory (LSM, France)</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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