标题： 双希格斯二重态模型中暗物质直接探测的广义盲点 显示英文标题

标题： Generalized Blind Spots for Dark Matter Direct Detection in the 2HDM

摘要： 本文研究了广义盲点的存在性问题，即参数空间中的区域，其中暗物质直接探测的自旋无关散射截面被抑制，在通用的两Higgs双模型和最小的费米子希格斯门户暗物质扇区的背景下。为此，我们推导出了暗物质与轻度和重度Higgs粒子耦合的解析表达式，从而得到了盲点解。与标准Higgs扇区的情况不同，即使没有不同贡献之间的抵消，盲点仍然可能发生，同时保持早期宇宙中涉及Higgs态的湮灭过程未被抑制且高效。因此，允许的参数空间大大扩展。 显示英文摘要

摘要： In this paper we study the presence of generalized blind spots, i.e. regions of the parameter space where the spin-independent cross section for dark matter direct detection is suppressed, in the context of a generic 2HDM and a minimal fermionic Higgs-portal dark sector. To this end, we derive analytical expressions for the couplings of the dark matter to the light and heavy Higgses, and thus for the blind spot solutions. Unlike the case of a standard Higgs sector, blind spots can occur even without a cancellation between different contributions, while keeping unsuppressed and efficient the annihilation processes in the early Universe involving Higgs states. As a consequence, the allowed parameter space is dramatically enhanced.