论文标题
lux-Zeplin暗物质搜索结果对中微子磁矩和中微子Millicharge的新约束
New constraint on neutrino magnetic moment and neutrino millicharge from LUX-ZEPLIN dark matter search results
论文作者
论文摘要
弹性中微子电子散射代表了研究钥匙中微子特性的强大工具。鉴于Lux-Zeplin合作发布的最新结果，我们首先确定了在中微子磁矩和中微子Millicharge上可以达到的极限，而在标准模型理论之外，其效果变得不可忽略。在这种情况下，我们评估并讨论了不同近似值描述中微子相互作用与原子电子的影响。与其他实验室界限相比，新的Lux-Zeplin数据使我们能够对中微子磁性时刻设置非常有竞争力的限制，即$μ_ν^{\ rm {eff}} <1.1 \ times 10^{ - 11}}}}}}}}} \ \，μ___ {\ by text {\ b} $ by Concortion conteriony $ copers a $ c.l. consim of 2.限制，代表了最近XenonNT结果后的第二好的世界限制。此外，利用所谓的同等光子近似，我们获得了中微子millicharge的最严格限制，即$ |q_ν^{\ rm {eff}} | <1.5 \ times 10^{ - 13} e_0 $ at 90 $ \％$ c.l.，这对先前的实验室界限表示了很大的改进。
Elastic neutrino-electron scattering represents a powerful tool to investigate key neutrino properties. In view of the recent results released by the LUX-ZEPLIN collaboration, we provide a first determination of the limits achievable on the neutrino magnetic moment and neutrino millicharge, whose effect becomes non-negligible in some beyond the Standard Model theories. In this context, we evaluate and discuss the impact of different approximations to describe the neutrino interaction with atomic electrons. The new LUX-ZEPLIN data allows us to set a very competitive limit on the neutrino magnetic moment when compared to the other laboratory bounds, namely $μ_ν^{\rm{eff}} < 1.1 \times 10^{-11} \, μ_{\text{B}}$ at 90$\%$ C.L., which improves by a factor of 2.5 the Borexino collaboration limit and represents the second best world limit after the recent XENONnT result. Moreover, exploiting the so-called equivalent photon approximation, we obtain the most stringent limit on the neutrino millicharge, namely $|q_ν^{\rm{eff}}| < 1.5 \times 10^{-13} e_0$ at 90$\%$ C.L., which represents a great improvement with respect to the previous laboratory bounds.
