论文标题
Dark $ sp（4）$理论中的单元介子
Singlet Mesons in Dark $Sp(4)$ Theories
论文作者
论文摘要
我们探索了$ sp（4）$量规理论的某些方面，并在复合戈德石暗物质的背景下具有两个基本费用。我们使用未改进的Wilson Fermions和标准的Plaquette Action提出了伪遵循的Iso-Singlet Meson $η'$质量的初步晶格结果。我们发现，$η'$比伪calloscalar non-singlets $π$稍重，并且比向量介子$ρ$较轻，用于多个合奏，带有$m_π/m_ρ\ geq 0.77 $。这种模式可能与超越标准模型物理模型构建相关。此外，我们表明，对于$ n_f = 1+1 $，口味不连续的伪cal $π^0 $很小。我们通过计算$ππ$散射长度$ a_0 $来补充这种测量值，这表明所研究的合奏可能与暗物质模型（例如强烈相互作用的大型粒子范式）具有现象学相关。
We explore some aspects of $Sp(4)$ gauge theory with two fundamental fermions in the context of composite Goldstone Dark Matter. We present preliminary lattice results for the mass of the pseudoscalar iso-singlet meson $η'$ using unimproved Wilson fermions and the standard plaquette action. We find that the $η'$ is slightly heavier than the pseudoscalar non-singlets $π$ and lighter than the vector mesons $ρ$ for multiple ensembles with $m_π/m_ρ\geq 0.77$. This pattern is potentially relevant for Beyond the Standard Model physics model building. Furthermore, we show that for $N_f=1+1$ flavours the disconnected contributions to the unflavoured pseudoscalar $π^0$ are small. We supplement this measurement by a calculation of the $ππ$ scattering length $a_0$ which shows that the ensemble studied might be phenomenologically relevant for Dark Matter models such as the Strongly Interacting Massive Particles paradigm.
