Chiral two-body currents plus many-body correlations in RPA+PVC quench the axial coupling g_A to 0.73-0.80 and reproduce experimental GT strengths in 56Ni, 100Sn, and 132Sn without extra adjustments.
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The quenching of the axial-vector coupling constant $g_A$ in $\beta$-decay: joint effects from chiral two-body currents and many-body correlations
Chiral two-body currents plus many-body correlations in RPA+PVC quench the axial coupling g_A to 0.73-0.80 and reproduce experimental GT strengths in 56Ni, 100Sn, and 132Sn without extra adjustments.