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
- NázevTitle
- 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 detectorMeasurement 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
- Druh výsledkuResult type
- Článek v časopiseJournal article
- AutořiAuthors
- R. Arnold, C. Augier, J. D. Baker, A. S. Barabash, L. Fajt, R. Hodák, F. Mamedov, P. Přidal, E. Rukhadze, A. Smetana, K. Smolek, I. Štekl
- Klíčová slovaKeywords
- double beta decay, Time Projection Chamber, nuclear-data sheets, 2-beta-2-nu decay, majoron
- ExperimentCollaboration
- NEMO-3
- DOIDOI
- 10.1103/PhysRevD.94.072003
- Časopis / citaceJournal / citation
- Physical Review D 94(7), 072003 (2016) · ISSN 2470-0010
- RokYear
- 2016
- JazykLanguage
- eng
- ZáznamyRecords
- ProjektProject
- Neurychlovačová astročásticová fyzika v podzemní laboratoři LSM (Francie)Non-accelerator astroparticle physics in the Modane Underground Laboratory (LSM, France); Technologie potlačení pozadí, detektorové techniky v jaderné fyzice a jejich aplikaceTechnologies of background suppression, detection techniques in nuclear physics and their applications
- CitovánoCited by
- 136 (INSPIRE-HEP)
- Plný text (open access)Full text (open access)
- http://link.aps.org/pdf/10.1103/PhysRevD.94.072003
- Citace ke staženíDownload citation
- TXT · BibTeX
AbstraktAbstract
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.
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.