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arXiv · hep-ph/9603213

New Leptoquark Mechanism of Neutrinoless Double Beta Decay

M. Hirsch·H. V. Klapdor-Kleingrothaus·S. G. Kovalenko
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Abstract

A new mechanism for neutrinoless double beta ($\znbb$) decay based on leptoquark exchange is discussed. Due to the specific helicity structure of the effective four-fermion interaction this contribution is strongly enhanced compared to the well-known mass mechanism of $\znbb$ decay. As a result the corresponding leptoquark parameters are severely constrained from non-observation of $\znbb$-decay. These constraints are more stringent than those derived from other experiments.

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M. Hirsch, H. V. Klapdor-Kleingrothaus, S. G. Kovalenko. 1996-03-04. New Leptoquark Mechanism of Neutrinoless Double Beta Decay. https://doi.org/10.1103/physrevd.54.r4207

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