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Final results on 82 Se double beta decay to the ground state of 82 Kr from the NEMO-3 experiment

  • R. Arnold
  • , C. Augier
  • , A. S. Barabash
  • , A. Basharina-Freshville
  • , S. Blondel
  • , S. Blot
  • , M. Bongrand
  • , D. Boursette
  • , V. Brudanin
  • , J. Busto
  • , A. J. Caffrey
  • , S. Calvez
  • , M. Cascella
  • , C. Cerna
  • , J. P. Cesar
  • , A. Chapon
  • , E. Chauveau
  • , A. Chopra
  • , L. Dawson
  • , D. Duchesneau
  • D. Durand, V. Egorov, G. Eurin, J. J. Evans, L. Fajt, D. Filosofov, R. Flack, X. Garrido, H. Gómez, B. Guillon, P. Guzowski, R. Hodák, A. Huber, P. Hubert, C. Hugon, S. Jullian, A. Klimenko, O. Kochetov, S. I. Konovalov, V. Kovalenko, D. Lalanne, K. Lang, Y. Lemière, T. Le Noblet, Z. Liptak, X. R. Liu, P. Loaiza, G. Lutter, C. Macolino, F. Mamedov, C. Marquet, F. Mauger, B. Morgan, J. Mott, I. Nemchenok, M. Nomachi, F. Nova, F. Nowacki, H. Ohsumi, R. B. Pahlka, C. Patrick, F. Perrot, F. Piquemal, P. Povinec, P. Přidal, Y. A. Ramachers, A. Remoto, J. L. Reyss, C. L. Riddle, E. Rukhadze, N. I. Rukhadze, R. Saakyan, R. Salazar, X. Sarazin, Yu Shitov, L. Simard, F. Šimkovic, A. Smetana, K. Smolek, A. Smolnikov, S. Söldner-Rembold, B. Soulé, I. Štekl, J. Suhonen, C. S. Sutton, G. Szklarz, J. Thomas, V. Timkin, S. Torre, Vl I. Tretyak, V. I. Tretyak, V. I. Umatov, I. Vanushin, C. Vilela, V. Vorobel, D. Waters, F. Xie, A. Žukauskas

Research output: Contribution to journalArticlepeer-review

56 Scopus citations

Abstract

Using data from the NEMO-3 experiment, we have measured the two-neutrino double beta decay (2 νββ) half-life of 82Se as T1/22ν=[9.39±0.17(stat)±0.58(syst)]×1019 y under the single-state dominance hypothesis for this nuclear transition. The corresponding nuclear matrix element is |M2 ν| = 0.0498 ± 0.0016. In addition, a search for neutrinoless double beta decay (0 νββ) using 0.93 kg of 82Se observed for a total of 5.25 y has been conducted and no evidence for a signal has been found. The resulting half-life limit of T1/20ν>2.5×1023y(90%C.L.) for the light neutrino exchange mechanism leads to a constraint on the effective Majorana neutrino mass of ⟨mν⟩<(1.2-3.0)eV, where the range reflects 0 νββ nuclear matrix element values from different calculations. Furthermore, constraints on lepton number violating parameters for other 0 νββ mechanisms, such as right-handed currents, majoron emission and R-parity violating supersymmetry modes have been set.

Original languageEnglish
Article number821
JournalEuropean Physical Journal C
Volume78
Issue number10
DOIs
StatePublished - Oct 1 2018

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