Electron angular correlation in neutrinoless double beta decay and new physics

A. Ali (DESY, Hamburg), A.V. Borisov and D.V. Zhuridov (MSU, Mosow)
Arxiv ID: 0801.2512Last updated: 4/29/2022
The angular correlation of the electrons in the neutrinoless double beta decay ($0\nu2\beta$) is calculated taking into account the nucleon recoil, the $S$ and $P$-waves for the electrons and the electron mass using a general Lorentz invariant effective Lagrangian. We show that the angular coefficient is essentially independent of the nuclear matrix element models. We work out the angular coefficient in several scenarios for new physics, in particular, in the left-right symmetric models.

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