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arXiv · 2304.08042

Constraints on NJL four-fermion effective interactions from neutrinoless double beta decay

Luca Pacioselli·Orlando Panella·Matteo Presilla·She-Sheng Xue
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Abstract

We study the contribution of a heavy right-handed Majorana neutrino to neutrinoless double beta decay ($0\nu\beta\beta$) via four-fermion effective interactions of Nambu-Jona-Lasinio (NJL) type. In this physical scenario, the sterile neutrino contributes to the nuclear transition through gauge, contact, and mixed interactions. Using the lower limit on the half-life of $0\nu\beta\beta$ from the KamLAND-Zen experiment, we then constrain the effective right-handed coupling between the sterile neutrino and the $W$ boson: $\mathcal{G}^{W}_{R}$. Eventually, we show that the obtained bounds are compatible with those found in the literature, which highlights the complementarity of this type of phenomenological study with high-energy experiments.

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Luca Pacioselli, Orlando Panella, Matteo Presilla, She-Sheng Xue. 2023-04-17. Constraints on NJL four-fermion effective interactions from neutrinoless double beta decay. https://doi.org/10.1007/jhep11(2023)054

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