European Physical Journal C: Particles and Fields (2020-07-01)

Precise measurement of $$2\nu \beta \beta $$ 2νββ decay of $$^{100}$$ 100 Mo with the CUPID-Mo detection technology

  • E. Armengaud,
  • C. Augier,
  • A.  S. Barabash,
  • F. Bellini,
  • G. Benato,
  • A. Benoît,
  • M. Beretta,
  • L. Bergé,
  • J. Billard,
  • Yu. A. Borovlev,
  • Ch. Bourgeois,
  • M. Briere,
  • V. Brudanin,
  • P. Camus,
  • L. Cardani,
  • N. Casali,
  • A. Cazes,
  • M. Chapellier,
  • F. Charlieux,
  • M. de Combarieu,
  • I. Dafinei,
  • F. A. Danevich,
  • M. De Jesus,
  • L. Dumoulin,
  • K. Eitel,
  • E. Elkhoury,
  • F. Ferri,
  • B. K. Fujikawa,
  • J. Gascon,
  • L. Gironi,
  • A. Giuliani,
  • V. D. Grigorieva,
  • M. Gros,
  • E. Guerard,
  • D. L. Helis,
  • H. Z. Huang,
  • R. Huang,
  • J. Johnston,
  • A. Juillard,
  • H. Khalife,
  • M. Kleifges,
  • V. V. Kobychev,
  • Yu. G. Kolomensky,
  • S. I. Konovalov,
  • A. Leder,
  • J. Kotila,
  • P. Loaiza,
  • L. Ma,
  • E. P. Makarov,
  • P. de Marcillac,
  • L. Marini,
  • S. Marnieros,
  • D. Misiak,
  • X.-F. Navick,
  • C. Nones,
  • V. Novati,
  • E. Olivieri,
  • J. L. Ouellet,
  • L. Pagnanini,
  • P. Pari,
  • L. Pattavina,
  • B. Paul,
  • M. Pavan,
  • H. Peng,
  • G. Pessina,
  • S. Pirro,
  • D. V. Poda,
  • O. G. Polischuk,
  • E. Previtali,
  • Th. Redon,
  • S. Rozov,
  • C. Rusconi,
  • V. Sanglard,
  • K. Schäffner,
  • B. Schmidt,
  • Y. Shen,
  • V. N. Shlegel,
  • B. Siebenborn,
  • V. Singh,
  • C. Tomei,
  • V. I. Tretyak,
  • V. I. Umatov,
  • L. Vagneron,
  • M. Velázquez,
  • M. Weber,
  • B. Welliver,
  • L. Winslow,
  • M. Xue,
  • E. Yakushev,
  • A. S. Zolotarova

DOI
https://doi.org/10.1140/epjc/s10052-020-8203-4
Journal volume & issue
Vol. 80, no. 7
pp. 1 – 10

Abstract

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Abstract We report the measurement of the two-neutrino double-beta ($$2\nu \beta \beta $$ 2νββ ) decay of $$^{100}$$ 100 Mo to the ground state of $$^{100}$$ 100 Ru using lithium molybdate ($$\hbox {Li}_2^{\;\;100}\hbox {MoO}_4$$ Li2100MoO4 ) scintillating bolometers. The detectors were developed for the CUPID-Mo program and operated at the EDELWEISS-III low background facility in the Modane underground laboratory (France). From a total exposure of 42.235 kg$$\times $$ × day, the half-life of $$^{100}$$ 100 Mo is determined to be $$T_{1/2}^{2\nu }=[7.12^{+0.18}_{-0.14}\,\mathrm {(stat.)}\pm 0.10\,\mathrm {(syst.)}]\times 10^{18}$$ T1/22ν=[7.12-0.14+0.18(stat.)±0.10(syst.)]×1018 years. This is the most accurate determination of the $$2\nu \beta \beta $$ 2νββ half-life of $$^{100}$$ 100 Mo to date.