论文标题
活跃至微分的中微子过渡偶极矩和Xenon1t多余
An Active-to-Sterile Neutrino Transition Dipole Moment and the XENON1T Excess
论文作者
论文摘要
在此简短字母中，我们发现Tau和无菌中微子之间的磁过渡偶极矩可以解释Xenon1t过量事件。与普通的中微子偶极力矩不同，新的无菌质量尺度的引入可以抑制天体物理界限。有趣的是，与SN1987A兼容的最佳拟合区域意味着Boron-8或CNO中微子是源通量。我们发现，$ \ sim $ 260 keV或在$ \ sim $（500-800）中的无菌中微子能够逃避天体物理限制，同时能够成功解释XENON1T事件率。最佳拟合参数空间中的无菌中微子可能会对大爆炸核合成（BBN）产生重大影响。我们展示了宇宙较低温度可能允许BBN约束的区域。
In this short letter, we find that a magnetic transition dipole moment between tau and sterile neutrinos can account for the XENON1T excess events. Unlike the ordinary neutrino dipole moment, the introduction of the new sterile mass scale allows for astrophysical bounds to be suppressed. Interestingly, the best-fit regions that are compatible with the SN1987A imply either boron-8 or CNO neutrinos as the source flux. We find that sterile neutrinos of either $\sim$ 260 keV or in the $\sim$(500 - 800) keV mass range are capable of evading astrophysical constraints while being able to successfully explain the XENON1T event rate. The sterile neutrino in the best fit parameter space may have significant effects on big bang nucleosynthesis (BBN). We show the region in which a low reheating temperature of the Universe may allow the BBN constraints to be alleviated.
