Nuclear matrix elements of double beta decay from beta decay

Details Nuclear matrix elements of double beta decay from beta decay Nuclear matrix elements of double beta decay from beta decay

2004-12-16

arxiv.org/abs/nucl-th/0412064v1

Phys.Lett. B607 (2005) 87-95

Physics

Nuclear Physics

Nuclear Theory

14 pages, 3 figures

Scientific paper

10.1016/j.physletb.2004.12.048

The evaluation of the nuclear matrix elements (NME) of the two-neutrino double beta ($2\nu\beta\beta$) decay and neutrinoless double beta ($0\nu\beta\beta$) 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 $2\nu\beta\beta$ 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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