论文标题
Xenon1t窗口中轴上的新宇宙学界限
New cosmological bounds on axions in the XENON1T window
论文作者
论文摘要
由Xenon1t实验最近检测到的过剩事件的可能的$ \ sim $ ev-mass太阳轴轴承的动机，我重新访问并更新了有关此质量范围内轴的宇宙学限制。我发现允许的Xenon1t质量窗口（DFSZ轴为0.1-4.1 eV，KSVZ轴为46-56 eV），只有0.1-0.35 eV在鉴于当前宇宙学探针的情况下保持在95％的置信度。如果存在0.35 EV DFSZ轴，则可以通过两种独立的物理效应在$ {\ sim}7σ$下检测到它，并具有下一代CMB-S4实验。相反，即使CMB-S4与未来的DESI测量结果的组合也仅仅落后于保证0.1 EV-MAS轴上轴，也可以被检测到或排除。 $Δn_{\ rm eff} <0.027 $的未来极限可能排除在广泛质量中的任何类似轴突的粒子，只要重新加热温度不太低，或者，或者，或者替代地，未来的宇宙学检测类似于轴的粒子可能会成为最紧密的现有观察到的现有观察力下降，对重复的温度最紧。
Motivated by a possible $\sim$ eV-mass solar axion explanation to excess events recently detected by the XENON1T experiment, I revisit and update cosmological constraints on axions in this mass range. I find that of the allowed XENON1T mass window (0.1 - 4.1 eV for DFSZ axions and 46 - 56 eV for KSVZ axions), only 0.1 - 0.35 eV remains viable at 95% confidence given current cosmological probes. If a 0.35 eV DFSZ axion existed, it would be detectable at ${\sim}7σ$ via two independent physical effects with the next-generation CMB-S4 experiment. Conversely, even a combination of CMB-S4 with future DESI measurements falls just short of guaranteeing a 0.1 eV-mass axion can be detected or ruled out. A future limit of $ΔN_{\rm eff}<0.027$ could rule out any generic axion-like particle across a wide range of masses as long as the reheating temperature is not too low, or alternatively, a future cosmological detection of such an axion-like particle could become the tightest existing observational lower bound on the reheating temperature.
