engleski

Exact evaluation of the nuclear form factor for new kinds of majoron emission in neutrinoles double beta decay

We have developed formalism, based on the Fourier-Bessel expansion, that facilitates the evaluation of matrix elements involving nucleon recoil operators, such as appear in several exotic forms of neutrinoless double beta decay.The method is illustrated by applying it to the "charged" majoron model, which is one of the few that can hope to produce an observable effect. From our numerical computations within QRPA performed for various nuclei, we test the validity of approximations made in earlier work to simplify the new matrix elements, showing that they are accurate to within 15%. Our method is also suitable for computing previously unevaluated eta eta_0 i nuclear matrix elements.

exact; majoron; double beta decay

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