6533b7cefe1ef96bd1256ecd

RESEARCH PRODUCT

Measurement of the double-βdecay half-life ofNd150and search for neutrinoless decay modes with the NEMO-3 detector

C.s. SuttonJ. ArgyriadesG. BroudinI. NemchenokD. DurandH. OhsumiV. EgorovPh. HubertTs. VylovC. LonguemareD. LalanneYu. ShitovJouni SuhonenM. BongrandA.a. SmolnikovI. VanyushinS. SnowS. JullianS. Söldner-remboldA.j. CaffreyV. BrudaninJ. S. RicolI. NastevaF. NovaG. SzklarzN. Fatemi-ghomiA. S. BarabashX. SarazinC. AugierVit VorobelJ. BakerL. VálaV. I. UmatovZ. DaraktchievaR. ArnoldKarol LangJ. JerieV. VasilievL. SimardY. LemièreA. NachabR. FlackJuergen ThomasVl.i. TretyakP. NovellaCh. MarquetF. MaugerJ. Martín-alboI. ŠTeklV. KovalenkoA. A. KlimenkoRuben SaakyanS. I. KonovalovGuillaume LutterE. ChauveauJ. L. ReyssO. KochetovM. KauerS. KingR. B. PahlkaFedor ŠImkovicV. TimkinT. LamhamdiA. Basharina-freshvilleF. PiquemalF. Perrot

subject

PhysicsNuclear and High Energy PhysicsParticle physics010308 nuclear & particles physicsElementary particle7. Clean energy01 natural sciencesBeta decayNuclear physicsMAJORANADouble beta decay0103 physical sciencesNeutrino010306 general physicsRadioactive decayMajoronLepton

description

The half-life for double-{beta} decay of {sup 150}Nd has been measured by the NEMO-3 experiment at the Modane Underground Laboratory. Using 924.7 days of data recorded with 36.55 g of {sup 150}Nd, we measured the half-life for 2{nu}{beta}{beta} decay to be T{sub 1/2}{sup 2{nu}}=(9.11{sub -0.22}{sup +0.25}(stat.){+-}0.63(syst.))x10{sup 18} yr. The observed limit on the half-life for neutrinoless double-{beta} decay is found to be T{sub 1/2}{sup 0{nu}}>1.8x10{sup 22} yr at 90% confidence level. This translates into a limit on the effective Majorana neutrino mass of <4.0-6.3 eV if the nuclear deformation is taken into account. We also set limits on models involving Majoron emission, right-handed currents, and transitions to excited states.

yearjournalcountryeditionlanguage
2009-09-03Physical Review C
https://doi.org/10.1103/physrevc.80.032501