Lepton Number Violating Electron Recoils in a $U(1)_{B-L}$ Model with Non-Standard Interactions

Yugen Lin; Yu Gao; Tianjun Li

doi:10.1016/j.nuclphysb.2022.116040

paper

Lepton Number Violating Electron Recoils in a $U (1)_{B - L}$ Model with Non-Standard Interactions

arXiv:2006.16192 · doi:10.1016/j.nuclphysb.2022.116040

Abstract

We propose an $S U (3)_{C} \times S U (2)_{L} \times U (1)_{Y} \times U (1)_{B - L}$ model, in which the neutrino masses and mixings 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 $y_{ν}^{'} y_{e} < 0.5 \times 1 0^{- 6}$ .

arXiv comment25 pages, 6 figures, 1 table, XenonNT results included

Lepton Number Violating Electron Recoils in a U(1)B−L​ Model with Non-Standard Interactions

Abstract

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Lepton Number Violating Electron Recoils in a $U (1)_{B - L}$ Model with Non-Standard Interactions