论文标题
具有电磁形式因子的黑色状态
Dark states with electromagnetic form factors at electron colliders
论文作者
论文摘要
电磁中性的黑暗区域颗粒可能通过更高的有效算子（例如质量差异5磁和电偶极矩）和质量差异6 Anapole矩和电荷半径算子与光子微弱地与光子相互作用。在这项工作中，我们使用超额定量规场的形式来处理黑色状态，这不仅会诱发电磁形式，还会引起相应的$ z $玻色子操作员。以Dirac Fermion $χ$为例，我们研究了通过Monophoton搜索在当前和未来$ e^+E^ - $ E^+E^ - collider实验中搜索此类黑色状态的探索。与当前的实验相比，我们发现，与几个GEV的质量中心一起运行，包括BESIII，STCF，Belle II在内的电子颜色对相应的质量差异5操作员对相应的电磁形式的敏感性具有前所未有的敏感性，该质量数5运算符具有黑暗状态较轻的GEV，但它们无法为竞争力的上限提供竞争力的上限，使得对质量符号的上限6操作员6运算符。未来的CEPC在具有竞争力亮度的$ z $ -Boson的质量上和超越质量的质量中，可以探测深色状态的未探索参数空间，其中质量差异为5（6）$ M \ m \ m \ Messim 100 $ 100 $ GEV（10 MEV $ \ sieldsim m \ sillsim m \ sillsim 100 $ $ GEV）。
Electromagnetically neutral dark sector particles may feebly interact with photons through higher dimensional effective operators, such as mass-dimension 5 magnetic and electric dipole moment, and a mass-dimension 6 anapole moment and charge radius operators. In this work, we use hypercharge gauge field form factors to treat dark states, which will induce not only electromagnetic form factors but also the corresponding $Z$ boson operators. Taking a Dirac fermion $χ$ as an example, we investigate the probes of searching for such dark states at current and future $e^+e^-$ collider experiments including BESIII, STCF, Belle II and CEPC via monophoton searches. Comparing to current experiments, we find that electron colliders including BESIII, STCF, Belle II, which operate with the center-of-mass at several GeV, have leading sensitivity on the corresponding electromagnetic form factors for the mass-dimension 5 operators with dark states lighter than several GeV, while they can not provide competitive upper limits for the mass-dimension 6 operators. Future CEPC operated with the center-of-mass on and beyond the mass of $Z$-boson with competitive luminosity can probe the unexplored parameter space for dark states with mass-dimension 5 (6) operators in the mass region of $m\lesssim 100 $ GeV (10 MeV $\lesssim m\lesssim 100 $ GeV).
