Effects of three-nucleon forces and two-body currents on Gamow-Teller strengths

A. Ekström*, G. R. Jansen, K. A. Wendt, G. Hagen, T. Papenbrock, S. Bacca, B. Carlsson, D. Gazit

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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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 C14 and O22,24 using consistent two-body currents. We compute spectra of the daughter nuclei N14 and F22,24 via an isospin-breaking coupled-cluster technique, with several predictions. The two-body currents reduce the Ikeda sum rule, corresponding to a quenching factor q2≈0.84-0.92 of the axial-vector coupling. The half-life of C14 depends on the energy of the first excited 1+ state, the three-nucleon force, and the two-body current.

Original languageAmerican English
Article number262504
JournalPhysical Review Letters
Issue number26
StatePublished - 30 Dec 2014

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© 2014 American Physical Society.


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