论文标题
螺旋电磁场在轴窗上的影响
Impact of Helical Electromagnetic Fields on the Axion Window
论文作者
论文摘要
原始电磁场可以强烈影响轴的宇宙演化，反之亦然。我们表明，如果螺旋电磁场在早期的宇宙中连贯生产，则它们的残余物将磁场速度源于耦合轴，并增强了轴轴线深色物质的遗物丰度。我们讨论了耦合到SM或隐藏量规组的QCD轴和类似轴的粒子的含义。 For a QCD axion coupled to hidden photons, we find that the conventional window for the axion decay constant $10^{8}\, \mathrm{GeV} \lesssim f \lesssim 10^{12}\, \mathrm{GeV}$ can be completely closed due to overproduction of axion dark matter by helical electromagnetic fields as little as $α\，δn_ {\ MathRm {eff}} \ gtrsim 10^{ - 12} $，其中$α$是量规耦合，$Δn_{\ mathrm {eff}} $是有效的相关性自由度的自由度的自由度。
Primordial electromagnetic fields can strongly affect the cosmic evolution of axions, and vice versa. We show that if helical electromagnetic fields are coherently produced in the early universe, their remnants source a field velocity to the coupled axions and enhance the relic abundance of axion dark matter. We discuss the implications for the QCD axion and axion-like particles that are coupled to the SM or hidden gauge groups. For a QCD axion coupled to hidden photons, we find that the conventional window for the axion decay constant $10^{8}\, \mathrm{GeV} \lesssim f \lesssim 10^{12}\, \mathrm{GeV}$ can be completely closed due to overproduction of axion dark matter by helical electromagnetic fields as little as $α\, ΔN_{\mathrm{eff}} \gtrsim 10^{-12}$, where $α$ is the gauge coupling and $ΔN_{\mathrm{eff}}$ is the effective extra relativistic degrees of freedom of the hidden photons.
