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

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

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

Afiliação

Ekström A; Department of Physics and Center of Mathematics for Applications, University of Oslo, N-0316 Oslo, Norway.
Jansen GR; Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA and Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA.
Wendt KA; Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA and Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA.
Hagen G; Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA and Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA.
Papenbrock T; Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA and Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA.
Bacca S; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada and Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada.
Carlsson B; Department of Fundamental Physics, Chalmers University of Technology, SE-412 96 Göteborg, Sweden.
Gazit D; Racah Institute of Physics, Hebrew University, 91904 Jerusalem, Israel.

Phys Rev Lett ; 113(26): 262504, 2014 Dec 31.

Article em En | MEDLINE | ID: mdl-25615316

RESUMO

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.

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Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Prognostic_studies Idioma: En Revista: Phys Rev Lett Ano de publicação: 2014 Tipo de documento: Article País de afiliação: Noruega País de publicação: Estados Unidos

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