Short-range correlation effects on the nuclear matrix element of neutrinoless double-β decay

Omar Benhar, Riccardo Biondi, and Enrico Speranza
Phys. Rev. C 90, 065504 – Published 29 December 2014

Abstract

We report the results of a calculation of the nuclear matrix element of neutrinoless double-β decay of Ca48, carried out taking into account nucleon-nucleon correlations in both coordinate and spin space. Our numerical results, obtained using nuclear matter correlation functions, suggest that inclusion of correlations may lead to a 20% decrease of the matrix element, with respect to the shell-model prediction. This conclusion is supported by the results of an independent calculation, in which correlation effects are taken into account using the spectroscopic factors of Ca48, obtained from an ab initio many-body approach, to renormalize the shell-model states.

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  • Received 26 May 2014

DOI:https://doi.org/10.1103/PhysRevC.90.065504

©2014 American Physical Society

Authors & Affiliations

Omar Benhar1,*, Riccardo Biondi2,3,†, and Enrico Speranza2,3,‡

  • 1Center for Neutrino Physics, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA
  • 2Dipartimento di Fisica, “Sapienza” Università di Roma, I-00185 Roma, Italy
  • 3INFN, Sezione di Roma, I-00185 Roma, Italy

  • *Permanent address. INFN and Department of Physics, “Sapienza” Università di Roma, I-00185 Roma, Italy.
  • Present address. Dipartimento di Scienze Fisiche e Chimiche, Università degli Studi dell'Aquila, I-67100 L'Aquila, Italy, and INFN, Laboratori Nazionali del Gran Sasso (LNGS), I-67100 Assergi (AQ), Italy.
  • Present address. GSI, Helmholtzzentrum für Schwerionenforschung, Planckstrasse 1, D-64291 Darmstadt, Germany, and Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany.

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Issue

Vol. 90, Iss. 6 — December 2014

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