Uncertainties in the 0νββ-decay nuclear matrix elements

By V. Rodin, A. Faessler, Fedor Simkovic, P. Vogel. 2003

158 citations recorded by the source corpus.

The nuclear matrix elements M0ν of the neutrinoless double-beta decay (0νβ β) of most nuclei with known 2νββ-decay rates are systematically evaluated using the Quasiparticle Random Phase Approximation (QRPA) and Renormalized QRPA (RQRPA). The experimental 2νβ β-decay rate is used to adjust the most relevant parameter, the strength of the particle-particle interaction. With such procedure the M0ν values become essentially independent of single-particle basis size, the axial vector quenching factor, etc. Theoretical arguments in favor of the adopted way of determining the interaction parameters are presented. It is suggested that most of the spread among the published M0ν’s can be ascribed to the choices of implicit and explicit parameters, inherent to the QRPA method.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/bc20c8ccb39527452dd8c04237475caea93f410c

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Citations in the corpus

• Double Beta Decay, Majorana Neutrinos, and Neutrino Mass (2007, methodology): “Here, we merely note that recent papers Rodin et al. (2003, 2006), addressing issue 2) above, argue that if the strength of the pairing interaction is adjusted to fit experimental mass differences and (especially) if gpp is then adjusted to reproduce measured ββ(2ν) rates, then almost all QRPA-like…”
• Challenges in Double Beta Decay (2013, methodology): “ββ(2]) results have been used to calibrate QRPA calculations [48].”