Jastrow functions in double-beta decay

Details Jastrow functions in double-beta decay Jastrow functions in double-beta decay

2011-01-03

arxiv.org/abs/1101.0554v1

Phys.Rev.C83:034317,2011

Physics

Nuclear Physics

Nuclear Theory

6 pages, 5 figures

Scientific paper

10.1103/PhysRevC.83.034317

We use simple analytic considerations and a Monte Carlo calculation of nucleons in a box to argue that the use of Jastrow functions as short-range correlators in the commonly employed two-body-cluster approximation causes significant errors in the matrix elements for double-beta decay. The Jastrow approach appears to agree with others, however, if many-body clusters are included. A careful treatment of the charge-changing analog of the nuclear pair density shows, in addition, that differences between Unitary Correlator Operator Method and Brueckner methods for treating short-range correlations in double-beta are less significant than suggested by previous work.

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