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Electron angular correlation in neutrinoless double beta decay and new physics

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arxiv 0801.2512 v2 pith:DMEOF25T submitted 2008-01-16 hep-ph

classification hep-ph
keywords angularbetacoefficientcorrelationdecaydoubleelectronelectrons
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

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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