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

Journal Article · · Physical Review Letters
 [1];  [2];  [3];  [2];  [3];  [4];  [5];  [6]
  1. Univ. of Oslo (Norway)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
  3. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  4. TRIUMF, Vancouver, BC (Canada); University of Manitoba, Winnipeg, Manitoba (Canada)
  5. Chalmers University of Technology, Goteborg (Sweden)
  6. Hebrew Univ. of Jerusalem (Israel)

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

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
DOE Contract Number:
AC05-00OR22725
OSTI ID:
1265405
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 26 Vol. 113; ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English

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