Effects of three-nucleon forces and two-body currents on Gamow-Teller strengths
Nuclear Theory
2014-12-31 v1 Nuclear Experiment
Abstract
We optimize chiral interactions at next-to-next-to leading order to observables in two- and three-nucleon systems, and compute Gamow-Teller transitions in carbon-14, oxygen-22 and oxygen-24 using consistent two-body currents. We compute spectra of the daughter nuclei nitrogen-14, fluorine-22 and fluorine-24 via an isospin-breaking coupled-cluster technique, with several predictions. The two-body currents reduce the Ikeda sum rule, corresponding to a quenching factor q^2 ~ 0.84-0.92 of the axial-vector coupling. The half life of carbon-14 depends on the energy of the first excited 1+ state, the three-nucleon force, and the two-body current.
Keywords
Cite
@article{arxiv.1406.4696,
title = {Effects of three-nucleon forces and two-body currents on Gamow-Teller strengths},
author = {A. Ekström and G. R. Jansen and K. A. Wendt and G. Hagen and T. Papenbrock and S. Bacca and B. Carlsson and D. Gazit},
journal= {arXiv preprint arXiv:1406.4696},
year = {2014}
}