Projected Linear Response Theory for Charge-Exchange Excitations and Double Beta Decay
F. Krmpotić, A. Mariano, T. T. S. Kuo, K. Nakayama
Abstract
The projected random phase approximation (PRPA) for charge-exchange excitations is derived from the time-dependent variational principle. Explicit results for the unperturbed energies (including the self-energy corrections), the PRPA matrices, and the transition matrix elements are presented. The effect of the projection procedure on the two-neutrino ββ decay in 76Ge is briefly discussed.
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