Arbitrary mass Majorana neutrinos in neutrinoless double beta decay

Amand Faessler, Marcela González, Sergey Kovalenko, and Fedor Šimkovic
Phys. Rev. D 90, 096010 – Published 21 November 2014

Abstract

We revisit the mechanism of neutrinoless double beta (0νββ) decay mediated by the exchange with the heavy Majorana neutrino N of arbitrary mass mN, slightly mixed UeN with the electron neutrino νe. By assuming the dominance of this mechanism, we update the well-known 0νββ-decay exclusion plot in the mNUeN plane taking into account recent progress in the calculation of nuclear matrix elements within quasiparticle random phase approximation and improved experimental bounds on the 0νββ-decay half-life of Ge76 and Xe136. We also consider the known formula approximating the mN dependence of the 0νββ-decay nuclear matrix element in a simple explicit form. We analyze its accuracy and specify the corresponding parameters, allowing one to easily calculate the 0νββ-decay half-life for arbitrary mN for all the experimentally interesting isotopes without resorting to real nuclear structure calculations.

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  • Received 20 October 2014

DOI:https://doi.org/10.1103/PhysRevD.90.096010

© 2014 American Physical Society

Authors & Affiliations

Amand Faessler1, Marcela González2, Sergey Kovalenko2, and Fedor Šimkovic3,4,5

  • 1Institute für Theoretische Physik der Univesität Tübingen, Auf der Morgenstelle 14, D-72076 Tübingen, Germany
  • 2Universidad Técnica Federico Santa María, Centro-Científico-Tecnológico de Valparaíso, Casilla 110-V Valparaíso, Chile
  • 3Bogoliubov Laboratory of Theoretical Physics, JINR 141980 Dubna, Russia
  • 4Department of Nuclear Physics and Biophysics, Comenius University, Mlynská dolina F1, SK-842 48 Bratislava, Slovakia
  • 5Czech Technical University in Prague, 128-00 Prague, Czech Republic

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Issue

Vol. 90, Iss. 9 — 1 November 2014

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