Benchmarking 136Xe neutrinoless ββ decay matrix element calculations with the 138Ba(p,t) reaction

B. M. Rebeiro, S. Triambak, P. E. Garrett, B. A. Brown, G. C. Ball, R. Lindsay, P. Adsley, V. Bildstein, C. Burbadge, A. Diaz Varela, T. Faestermann, D. L. Fang, R. Hertenberger, M. Horoi, B. Jigmeddorj, M. Kamil, K. G. Leach, P. Z. Mabika, J. C. Nzobadila Ondze, J. N. OrceH. F. Wirth

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

We used a high-resolution magnetic spectrograph to study neutron pair-correlated 0+ states in 136Ba, produced via the Ba138(p,t) reaction. In conjunction with state-of-the-art shell model calculations, these data benchmark part of the dominant Gamow-Teller component of the nuclear matrix element (NME) for 136Xe neutrinoless double beta (0νββ) decay. We demonstrate for the first time an evaluation of part of a 0νββ decay NME by use of an experimental observable, presenting a new avenue of approach for more accurate calculations of 0νββ decay matrix elements.

Original languageEnglish
Article number135702
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume809
DOIs
StatePublished - Oct 10 2020

Keywords

  • Neutrinoless double beta decay
  • Nuclear matrix elements
  • QRPA
  • Shell model
  • Transfer reactions

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