Effects of Three-Nucleon Forces and Two-Body Currents on Gamow-Teller Strengths
Artikel i vetenskaplig tidskrift, 2014

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.

Gamow-Teller transition

Effective field theory

Coupled Cluster

Författare

Andreas Ekström

Gustav R. Jansen

Kyle A. Wendt

Gaute Hagen

Thomas Papenbrock

Sonia Bacca

Boris Karlsson

Chalmers, Fundamental fysik

Doron Gazit

Physical Review Letters

0031-9007 (ISSN) 1079-7114 (eISSN)

Vol. 113 26 262504-

Ämneskategorier

Subatomär fysik

Fundament

Grundläggande vetenskaper

DOI

10.1103/PhysRevLett.113.262504

Mer information

Skapat

2017-10-07