@article{3477270679d042ee9fbe396d7f62afe5,
title = "New determination of double- β -Decay properties in 48Ca: High-precision Qββ -Value measurement and improved nuclear matrix element calculations",
abstract = "We report a direct measurement of the Qββ value of the neutrinoless double-β-decay candidate 48Ca at the TITAN Penning-trap mass spectrometer, with the result that Qββ=4267.98(32)keV. We measured the masses of both the mother and daughter nuclides, and in the latter case found a 1 keV deviation from the literature value. In addition to the Qββ value, we also present results of a new calculation of the neutrinoless double-β-decay nuclear matrix element of 48Ca. Using diagrammatic many-body perturbation theory to second order to account for physics outside the valence space, we constructed an effective shell-model double-β-decay operator, which increased the nuclear matrix element by about 75% compared with that produced by the bare operator. The new Qββ value and matrix element strengthen the case for a 48Ca double-β-decay experiment.",
author = "Kwiatkowski, {A. A.} and T. Brunner and Holt, {J. D.} and A. Chaudhuri and U. Chowdhury and M. Eibach and J. Engel and Gallant, {A. T.} and A. Grossheim and M. Horoi and A. Lennarz and Macdonald, {T. D.} and Pearson, {M. R.} and Schultz, {B. E.} and Simon, {M. C.} and Senkov, {R. A.} and Simon, {V. V.} and K. Zuber and J. Dilling",
year = "2014",
month = apr,
day = "9",
doi = "10.1103/PhysRevC.89.045502",
language = "English",
volume = "89",
journal = "Physical Review C - Nuclear Physics",
issn = "0556-2813",
number = "4",
}