论文标题
伪金石暗物质中的$ b-l $扩展标准型号
Pseudo-Goldstone Dark Matter in gauged $B-L$ extended Standard Model
论文作者
论文摘要
在标准模型（SM）中衡量全局$ B-L $（BARYON编号减去Lepton Number）对称性是充分动机的，因为取消异常需要引入三个右撇子中微子（RHNS），这些中微子（RHNS）在通过SEESAW机制通过自然产生微小的SM中间群体中起着至关重要的作用。在$ B-L $扩展SM的背景下，我们提出了一个伪金石玻色子暗物质（DM）场景，其中复杂的$ B-L $ Higgs Field的虚构组件是宇宙中的DM。 DM遗物密度取决于Sm Higgs玻色子介导的过程，但是由于其伪岩石玻色子的性质，其通过Higgs玻色子的交换与核子通过核子的弹性散射高度抑制。因此，该模型不受直接DM检测实验产生的约束。我们确定模型参数空间的区域，用于再现与大型强子对撞机的约束以及Fermi-Lat和Magic的间接DM搜索相兼容的DM密度。
Gauging the global $B-L$ (Baryon number minus Lepton number) symmetry in the Standard Model (SM) is well-motivated since anomaly cancellations require the introduction of three right-handed neutrinos (RHNs) which play an essential role in naturally generating tiny SM neutrino masses through the seesaw mechanism. In the context of the $B-L$ extended SM, we propose a pseudo-Goldstone boson dark matter (DM) scenario in which the imaginary component of a complex $B-L$ Higgs field serves as the DM in the universe. The DM relic density is determined by the SM Higgs boson mediated process, but its elastic scattering with nucleons through the exchange of Higgs bosons is highly suppressed due to its pseudo-Goldstone boson nature. The model is therefore free from the constraints arising from direct DM detection experiments. We identify regions of the model parameter space for reproducing the observed DM density compatible with the constraints from the Large Hadron Collider and the indirect DM searches by Fermi-LAT and MAGIC.
