论文标题
PBH辅助搜索QCD Axion暗物质
PBH assisted search for QCD axion dark matter
论文作者
论文摘要
BBN ERA之前的熵产生是防止QCD轴的方法之一，它具有衰减常数$ f_ {a} \ in [10^{12} {\ rm gev}，10^{16} {\ rm gev} {\ rm gev}] $ $ $ ch $ $ the the Universe的宇宙$ $ ch \ rm。 i} = \ Mathcal {O}（1）$。因此，只要通过重粒子的衰减实现熵的产生，就必须伴随着早期占主导地位的时代（EMD）。在这项工作中，我们考虑了在EMD时代形成原始黑洞的可能性，假设在小尺度上假设增强的原始标量扰动（$ k> 10^{4} {\ rm mpc}^{ - 1} $）。在这种情况下，预计具有轴晕积分的PBH会发展为超紧凑型Minihalos（UCMHS）。我们研究了如何获得的UCMHS在[10^{12} {\ rm gev} {\ rm gev}，10^{16} {\ rm gev}] $中，如何使用$ f_ {a} \ in [10^{12} {\ rm gev} {\ rm gev}] $。
The entropy production prior to BBN era is one of ways to prevent QCD axion with the decay constant $F_{a}\in[10^{12}{\rm GeV},10^{16}{\rm GeV}]$ from overclosing the universe when the misalignment angle is $θ_{\rm i}=\mathcal{O}(1)$. As such, it is necessarily accompanied by an early matter-dominated era (EMD) provided the entropy production is achieved via the decay of a heavy particle. In this work, we consider the possibility of formation of primordial black holes during the EMD era with the assumption of the enhanced primordial scalar perturbation on small scales ($k>10^{4}{\rm Mpc}^{-1}$). In such a scenario, it is expected that PBHs with axion halo accretion develop to ultracompact minihalos (UCMHs). We study how UCMHs so obtained could be of great use in the experimental search for QCD axion dark matter with $F_{a}\in[10^{12}{\rm GeV},10^{16}{\rm GeV}]$.
