论文标题
核和电子中的纤毛吸收中的深色磁偶极子特性
Dark magnetic dipole property in fermionic absorption by nucleus and electrons
论文作者
论文摘要
核或电子靶标的费米子暗物质（DM）吸收为搜索子GEV DM提供了独特的信号。我们考虑在深色量规组和深色磁偶极子操作员下充电的Dirac Fermion DM。 DM场与右手中微子混合，并通过仪表场的动力学混合项与普通电磁电荷相互作用。结果，传入的DM被吸收并通过偶极 - 电荷相互作用在最终状态中转化为中微子。对于核的DM吸收，反冲能谱显示目标中的每个同位素在$m_χ^2/2M_N $处显示出峰值。 Xenon1t可以探测高于27 MEV的DM质量，并且对非弹性DM-Nucleon横截面的预计约束变为$ 10^{ - 49} $ cm $^2 $。能量阈值较低的CRESSTIII对2 MeV以上的DM质量敏感。我们还检查核磁偶极子的贡献是否可以忽略不计，对于$^{131} {\ rm Xe} $ target。通过结合电子靶标对DM的吸收诱导电离信号，并且对亚M-MEV DM质量敏感。电离形式的参与扩散了局部后坐力。我们展示了从$^{131} {\ rm Xe} $的电子电离耦合的磁性偶极子耦合的限制前景。
The fermionic dark matter (DM) absorption by nucleus or electron targets provides a distinctive signal to search for sub-GeV DM. We consider a Dirac fermion DM charged under a dark gauge group and with the dark magnetic dipole operator. The DM field mixes with right-handed neutrino and interacts with the ordinary electromagnetic charge current via the kinetic mixing term of gauge fields. As a result, the incoming DM is absorbed and converted into neutrino in final state through the dipole-charge interaction. For the DM absorption by nucleus, the recoil energy spectrum exhibit a peak at $m_χ^2/2m_N$ for each isotope in the target. XENON1T can probe the DM mass above 27 MeV and the projected constraint on the inelastic DM-nucleon cross section becomes $10^{-49}$ cm$^2$. CRESSTIII with lower energy threshold would be sensitive to the DM mass above 2 MeV. We also check that the contribution from the nuclear magnetic dipole is negligible for $^{131}{\rm Xe}$ target. The absorption of DM by bound electron target induces ionization signal and is sensitive to sub-MeV DM mass. The involvement of the ionization form factor spreads out the localized recoil energy. We show the future prospect for the constraint on the magnetic dipole coupling from the electron ionization of $^{131}{\rm Xe}$.
