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arXiv · 2102.09784

Constraints on general neutrino interactions with exotic fermion from neutrino-electron scattering experiments

Zikang Chen·Tong Li·Jiajun Liao
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Abstract

The couplings between the neutrinos and exotic fermion can be probed in both neutrino scattering experiments and dark matter direct detection experiments. We present a detailed analysis of the general neutrino interactions with an exotic fermion and electrons at neutrino-electron scattering experiments. We obtain the constraints on the coupling coefficients of the scalar, pseudoscalar, vector, axialvector, tensor and electromagnetic dipole interactions from the CHARM-II, TEXONO and Borexino experiments. For the flavor-universal interactions, we find that the Borexino experiment sets the strongest bounds in the low mass region for the electromagnetic dipole interactions, and the CHARM-II experiment dominates the bounds for other scenarios. If the interactions are flavor dependent, the bounds from the CHARM-II or TEXONO experiment can be avoided, and there are correlations between the flavored coupling coefficients for the Borexino experiment. We also discuss the detection of sub-MeV DM absorbed by bound electron targets and illustrate that the vector coefficients preferred by XENON1T data is allowed by the neutrino experiments.

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Zikang Chen, Tong Li, Jiajun Liao. 2021-05-22. Constraints on general neutrino interactions with exotic fermion from neutrino-electron scattering experiments. https://doi.org/10.1007/jhep05(2021)131

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