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arXiv 2006.16192hep-ph
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具有非标准相互作用的$U(1)_{B-L}$模型中轻子数破坏的电子粒子

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

Yugen Lin, Yu Gao, Tianjun Li

摘要:

我们提出了一个$SU(3)_C\times SU(2)_L\times U(1)_{Y}\times U(1)_{B-L}$模型,在该模型中,中微子质量和混合可以通过$U(1)_{B-L}$破缺后的I型跷跷板机制产生.一个光介体出现,并使非标准的相互作用,违反轻子数。结果表明,在该模型中出现了非标准中微子相互作用,并可导致伴随太阳中微子流的低能反冲事件。分析了最近的直接探测实验,包括XENON1T,PANDAX和XENONnT的keV范围内的电子反冲事件。最近的直接检测观测导致的上限的联合耦合强度的电子和中微子的$\sqrt{y'_νy_e} < 0.5 \times 10^{-6}$。

英文摘要:

We propose an $SU(3)_C\times SU(2)_L\times U(1)_{Y}\times U(1)_{B-L}$ 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 $\sqrt{y'_νy_e} < 0.5 \times 10^{-6}$.

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