论文标题
电磁能注入的子GEV暗载体玻色子的宇宙学界限
Cosmological Bounds on sub-GeV Dark Vector Bosons from Electromagnetic Energy Injection
论文作者
论文摘要
新的深色矢量玻色子非常易于定期物质，可以在早期的宇宙中创建，并在重新组合时大爆炸核合成（BBN）或宇宙微波背景（CMB）的形成后腐烂。通过这种衰减注入的能量可以改变光元素的丰度或修改CMB的功率和频谱。在这项工作中，我们研究了这些影响对一系列子GEV黑暗向量所隐含的约束，包括动力学混合的深色光子，以及$ b-l $，$ l_e-l_μ$，$ l_e-e-e-l_τ$和$l_μ-l_-μ-l_-l_-l_τ$ dark u（1）。我们专注于电磁能注射的影响，并通过考虑到与BBN相关的光子级联频谱中的非宇宙性以及在我们将修饰对CMB进行修饰治疗中重新组合后的电离效率相关的光子级联光谱以及电离效率的能量依赖性，从而更新了对暗光子和其他暗矢量衰变的研究。
New dark vector bosons that couple very feebly to regular matter can be created in the early universe and decay after the onset of big bang nucleosynthesis (BBN) or the formation of the cosmic microwave background (CMB) at recombination. The energy injected by such decays can alter the light element abundances or modify the power and frequency spectra of the CMB. In this work we study the constraints implied by these effects on a range of sub-GeV dark vectors including the kinetically mixed dark photon, and the $B-L$, $L_e-L_μ$, $L_e-L_τ$ , and $L_μ-L_τ$ dark U(1) bosons. We focus on the effects of electromagnetic energy injection, and we update previous investigations of dark photon and other dark vector decays by taking into account non-universality in the photon cascade spectrum relevant for BBN and the energy dependence of the ionization efficiency after recombination in our treatment of modifications to the CMB.
