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

Andreas Ekström ; Gustav R. Jansen ; Kyle A. Wendt ; Gaute Hagen ; Thomas Papenbrock ; Sonia Bacca ; Boris Carlsson (Institutionen för fundamental fysik) ; Doron Gazit
Physical Review Letters (0031-9007). Vol. 113 (2014), 26, p. 262504.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: Effective field theory, Gamow-Teller transition, Coupled Cluster



Denna post skapades 2015-01-12. Senast ändrad 2015-06-12.
CPL Pubid: 210555

 

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Institutioner (Chalmers)

Institutionen för fundamental fysik (2005-2015)

Ämnesområden

Lågenergifysik

Chalmers infrastruktur