Effects of Three-Nucleon Forces and Two-Body Currents on Gamow-Teller Strengths

2014/12/30 by A. Ekström, G. R. Jansen, G. R. Jansen +10 · 5 citations
Physics and Astronomy · #Nuclear physics research studies #Quantum Chromodynamics and Particle Interactions #Advanced Chemical Physics Studies

paper · doi:10.1103/physrevlett.113.262504

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 14C and (22,24)O using consistent two-body currents. We compute spectra of the daughter nuclei 14N and (22,24)F 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 14C depends on the energy of the first excited 1+ state, the three-nucleon force, and the two-body current.

Citations

• Medium-Mass Nuclei with Normal-Ordered Chiral N N + 3 N Interactions

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