论文标题
pseudo-nambu-goldstone暗物质来自估计的$ u（1）_ {b-l} $对称性
Pseudo-Nambu-Goldstone dark matter from gauged $U(1)_{B-L}$ symmetry
论文作者
论文摘要
伪-Nambu-Goldstone玻色子（PNGB）是暗物质的有吸引力的候选者，因为目前的暗物质直接检测实验的严重限制自然而然地避免了其性质。我们基于{\ it测量} $ u（1）_ {b-l} $对称性的PNGB暗物质构建模型，其中不假定Ad-Hoc全局对称性。该模型保留了暗物质直接检测横截面的自然抑制机制。另一方面，PNGB可以通过新的高度抑制操作员衰减。我们表明，PNGB的寿命足够长，可以在模型的参数空间的广泛范围内成为暗物质。 PNGB暗物质的热遗物丰度可以与观察到的值相吻合，以与宇宙射线观测的暗物质衰减的约束。
A pseudo-Nambu-Goldstone boson (pNGB) is an attractive candidate for dark matter since the current severe limits of dark matter direct detection experiments are naturally evaded by its nature. We construct a model with pNGB dark matter based on a {\it gauged} $U(1)_{B-L}$ symmetry, where no ad-hoc global symmetry is assumed. The model keeps natural suppression mechanism for the dark matter direct detection cross section. On the other hand, the pNGB can decay through the new high scale suppressed operators. We show that the pNGB has long enough lifetime to be a dark matter in the wide range of the parameter space of the model. The thermal relic abundance of pNGB dark matter can be fit with the observed value against the constraints on the dark matter decays from the cosmic-ray observations.
