论文标题
热产生的轴突样颗粒上的新型宇宙学边界
Novel cosmological bounds on thermally-produced axion-like particles
论文作者
论文摘要
我们使用来自宇宙微波背景（CMB）光谱的数据和Baryon声学振荡来限制热生产的轴突样颗粒（此处轴）与光子和元素的偶联。轴是具有明显的软性断裂质量项，并且在早期的宇宙中从轴 - 仪或轴 - 螺旋体过程中热产生，这考虑了该领域的最新进展。我们在迄今为止在质量范围内的轴丝耦合上得出了最严格的界限，该量范围被认为$ 10^{ - 4} \ Lessim m_a/{\ rm ev} \ sillsim 100 $，从SN1987A中取代电流界限。 Axion-Photon耦合的界限与轴质量$ M_A \ GTRSIM 3 \，$ eV的演员协作的结果具有竞争力。我们对未来CMB-S4任务的敏感性将获得的预测范围评论。
We constrain the coupling of thermally-produced axion-like particles (here axions) with photons and gluons, using data from the cosmic microwave background (CMB) spectra and baryon acoustic oscillations. The axion possesses an explicit soft breaking mass term and it is produced thermally in the early Universe from either axion-photon or axion-gluon processes, accounting for the recent progresses in the field. We derive the most stringent bounds on the axion-gluon coupling to date on the mass range considered $10^{-4} \lesssim m_a/{\rm eV} \lesssim 100$, superseding the current bounds from SN1987A. The bounds on the axion-photon coupling are competitive with the results from the CAST collaboration for the axion mass $m_a \gtrsim 3\,$eV. We comment on the forecast reaches that will be available given the sensitivity of future CMB-S4 missions.
