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Nuclear matrix elements of double beta decay from beta decay

Jouni Suhonen
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Abstract

The evaluation of the nuclear matrix elements (NME) of the two-neutrino double beta ($2νββ$) decay and neutrinoless double beta ($0νββ$) decay using the proton-neutron quasiparticle random-phase approximation (pnQRPA) is addressed. In particular, the extraction of a proper value of the proton-neutron particle-particle interaction parameter, $g_{\rm pp}$, of this theory is analyzed in detail. Evidence is shown, that it can be misleading to use the experimental half-life of the $2νββ$ decay to extract a value for $g_{\rm pp}$. Rather, arguments are given in favour of using the available data on single beta decay for this purpose.

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Jouni Suhonen. 2004-12-16. Nuclear matrix elements of double beta decay from beta decay. https://doi.org/10.1016/j.physletb.2004.12.048

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