论文标题
在$ b-l $型号中，暗物质衰减对能量尺度的限制
Constraints on energy scales from dark matter decay in a gauged $B-L$ model
论文作者
论文摘要
粒子物理标准模型的流行扩展具有新的领域和对称性，例如，可以从$ b-l $自发对称性破裂中动态产生中微子质量。如果在理论的范围中出现一个新的光标度标量出现在黑暗辐射中，则可以显着改变宇宙学可观察到。在这种情况下，冷暗物质可能具有稳定的衰减成分，并限制了其衰减率$γ_ {\ rm dcdm} $可以用来对给定模型的新能量尺度放大约束。我们使用测量的$ b-l $模型来说明这个想法，其中黑暗辐射是光中微子的形式。
Popular extensions of the standard model of particle physics feature new fields and symmetries which could, for example, dynamically generate neutrino masses from $B-L$ spontaneous symmetry breaking. If a new light scalar that decays into dark radiation appears in the spectrum of the theory, it could significantly modify the cosmological observables. In this case, cold dark matter could have a stable and a decaying component and limits on its decay rate $Γ_{\rm dcdm}$ can be used to put constraints on the new energy scales of a given model. We illustrate this idea using a gauged $B-L$ model where the dark radiation is in the form of light neutrinos.
