Results of the search for neutrinoless double- ? decay in Mo 100 with the NEMO-3 experiment
Result description
The NEMO-3 detector, which had been operating in the Modane Underground Laboratory from 2003 to 2010, was designed to search for neutrinoless double-? (0???) decay. We report the final results of a search for 0??? decays with 6.914 kg of Mo100 using theentire NEMO-3 data set with a detector live time of 4.96 yr, which corresponds to an exposure of 34.3kg.yr. We perform a detailed study of the expected background in the 0??? signal region and find no evidence of 0??? decays in the data. The level of observed background in the 0??? signal region [2.8-3.2] MeV is 0.44?0.13counts/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??? decays in Mo100 of T1/2(0???)>1.1x1024yr 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 calculating nuclear matrix elements, the limit for the effective Majorana neutrino mass lies in
Keywords
The result's identifiers
Result code in IS VaVaI
Result on the web
DOI - Digital Object Identifier
Alternative languages
Result language
angličtina
Original language name
Results of the search for neutrinoless double- ? decay in Mo 100 with the NEMO-3 experiment
Original language description
The NEMO-3 detector, which had been operating in the Modane Underground Laboratory from 2003 to 2010, was designed to search for neutrinoless double-? (0???) decay. We report the final results of a search for 0??? decays with 6.914 kg of Mo100 using theentire NEMO-3 data set with a detector live time of 4.96 yr, which corresponds to an exposure of 34.3kg.yr. We perform a detailed study of the expected background in the 0??? signal region and find no evidence of 0??? decays in the data. The level of observed background in the 0??? signal region [2.8-3.2] MeV is 0.44?0.13counts/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??? decays in Mo100 of T1/2(0???)>1.1x1024yr 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 calculating nuclear matrix elements, the limit for the effective Majorana neutrino mass lies in
Czech name
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Czech description
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Classification
Type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BG - Nuclear, atomic and molecular physics, accelerators
OECD FORD branch
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Result continuities
Project
LG14003: Non-accelerator astroparticle physics in the Modane Underground Laboratory (LSM, France)
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review D
ISSN
1550-7998
e-ISSN
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Volume of the periodical
92
Issue of the periodical within the volume
7
Country of publishing house
US - UNITED STATES
Number of pages
23
Pages from-to
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UT code for WoS article
000363237400002
EID of the result in the Scopus database
2-s2.0-84945370746
Basic information
Result type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP
BG - Nuclear, atomic and molecular physics, accelerators
Year of implementation
2015