Uncertainty in the 0νββ decay nuclear matrix elements
Abstract
The nuclear matrix elements M^{0ν} of the neutrinoless doublebeta decay ( 0νββ ) are evaluated for ^{76 }_{ }Ge , ^{100 }_{ }Mo , ^{130 }_{ }Te , and ^{136 }_{ }Xe within the renormalized quasiparticle random phase approximation (RQRPA) and the simple QRPA. Three sets of single particle level schemes are used, ranging in size from 9 to 23 orbits. When the strength of the particleparticle interaction is adjusted so that the 2νββ decay rate is correctly reproduced, the resulting M^{0ν} values become essentially independent of the size of the basis, and of the form of different realistic nucleonnucleon potentials. Thus, one of the main reasons for variability of the calculated M^{0ν} within these methods is eliminated.
 Publication:

Physical Review C
 Pub Date:
 October 2003
 DOI:
 10.1103/PhysRevC.68.044302
 arXiv:
 arXiv:nuclth/0305005
 Bibcode:
 2003PhRvC..68d4302R
 Keywords:

 23.40.Hc;
 21.60.n;
 Relation with nuclear matrix elements and nuclear structure;
 Nuclear structure models and methods;
 Nuclear Theory
 EPrint:
 5 pages, 2 figures