论文标题
Electroweak相过渡面临暗物质检测约束
Electroweak phase transition confronted with dark matter detection constraints
论文作者
论文摘要
我们研究了SM的真实和复杂单线扩展中的II型一阶电子相变和暗物质（DM）现象学。在带有$ \ mathbb {z} _2 $对称性的真实单曲线扩展中，我们表明，相过渡所青睐的参数区域受到DM直接检测的强大约束，因此只有可忽略不计的分数（$ f_ {x}} \ sim 10^{-4} -10^{-4} -10} -10} -10^{-5}^{-5} $ compar of DM sclive of DM XENON1T约束。在复杂的Singlet $ S $ CASE中，我们将$ CP $对称$ s \向标量电势强加于S^{*} $。 $ S $的真正组成部分可以与Sm Higgs玻色子混合，而虚构组件由于保护$ CP $对称性而成为DM候选者。通过考虑到无形的希格斯衰减的当前实验约束，希格斯信号强度测量和暗物质探测，我们发现在解释所有暗物质物质密度的同时，发生了一个较大的参数空间，用于发生II型电动electeroweak相变。我们确定了一个参数空间的子集，该子集有望将来实验，包括HL-LHC处的Di-Higgs和Higgs信号强度测量以及Xenonnt Project中的暗物质直接检测。
We study the type-II first-order electroweak phase transition and dark matter (DM) phenomenology in both real and complex singlet extensions of SM. In the real singlet extension with a $\mathbb{Z}_2$ symmetry, we show that the parameter regions favored by the phase transition suffer from strong constraints from DM direct detection so that only a negligible fraction ($f_{X}\sim 10^{-4}-10^{-5}$) of DM composed of the real singlet scalar can survive the LUX and XENON1T constraints. In the complex singlet $S$ case, we impose a $CP$ symmetry $S\to S^{*}$ to the scalar potential. The real component of $S$ can mix with SM Higgs boson while the imaginary component becomes a DM candidate due to the protection of the $CP$ symmetry. By taking into account the current experimental constraints of invisible Higgs decays, Higgs signal strength measurements, and dark matter detections, we find that there exists a large parameter space for the type-II electroweak phase transition to occur while explaining all of the dark matter relic density. We identify a subset of parameter space that is promising for future experiments, including the di-Higgs and Higgs signal strength measurements at the HL-LHC and the dark matter direct detection in the XENONnT project.
