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Quantum Monte Carlo Calculations Of Weak Transitions In A=6-10 Nuclei, S. Pastore, A. Baroni, S. Gandolfi, R. Schiavilla, R. B. Wiringa

Physics Faculty Publications

Ab initio calculations of the Gamow-Teller (GT) matrix elements in the β decays of ⁶He and ¹⁰C and electron captures in 7Be are carried out using both variational and Green's function Monte Carlo wave functions obtained from the Argonne v18 two-nucleon and Illinois-7 three-nucleon interactions, and axial many-body currents derived from either meson-exchange phenomenology or chiral effective field theory. The agreement with experimental data is excellent for the electron captures in ⁷Be, while theory overestimates the ⁶He and ¹⁰C data by ~2% and ~10%, respectively. We show that for these systems correlations in the nuclear …