Ekström A, Jansen G R, Wendt K A, Hagen G, Papenbrock T, Bacca S, Carlsson B, Gazit D
Department of Physics and Center of Mathematics for Applications, University of Oslo, N-0316 Oslo, Norway.
Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA and Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA.
Phys Rev Lett. 2014 Dec 31;113(26):262504. doi: 10.1103/PhysRevLett.113.262504. Epub 2014 Dec 30.
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.
我们将手征相互作用优化到次领头阶，以研究两核子和三核子系统中的可观测量，并使用一致的两体流计算(^{14}C)和((^{22,24}O))中的伽莫夫-特勒跃迁。我们通过同位旋破缺耦合簇技术计算了子核(^{14}N)和((^{22,24}F))的能谱，并给出了几个预测结果。两体流降低了池田和规则，对应于轴矢耦合的淬灭因子(q^2≈0.84 - 0.92)。(^{14}C)的半衰期取决于第一激发(1^+)态的能量、三核子力和两体流。
