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Lepton number violating electron recoils in a U (1)B-L model with non-standard interactions

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NUCLEAR PHYSICS B
卷 986, 期 -, 页码 -

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DOI: 10.1016/j.nuclphysb.2022.116040

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In this study, a new theoretical model is proposed, in which the masses and mixings of neutrinos can be generated through a specific mechanism after the breaking of U(1)(B-L). Experimental results show the emergence of non-standard neutrino interactions in this model, which can be tested through low-energy electron recoil events related to solar neutrino flux.
We propose an SU (3)(C) x SU (2)(L) x U (1)(Y) x U(1)(B-L) model, in which the neutrino masses and mix-ings can be generated via Type-I seesaw mechanism after U (1)(B-L) breaking. A light mediator emerges and enables non-standard interaction that violates the lepton number. We show that the non-standard neutrino interaction emerges in this model, and it can lead to low energy recoil events with the solar neutrino flux. Analyses are performed with the keV range electron recoil events at recent direct detection experiments, including XENON1T, PANDAX and XENONnT. Recent direct detection observations lead to upper bound on the combined coupling strength to electron and neutrino to root y(nu)y(e) < 0.5 x 10(-6). (c) 2022 Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3.

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