论文标题
在即将到来的21 cm功率谱观察中预期新的物理信号
Anticipating a New-Physics Signal in Upcoming 21-cm Power Spectrum Observations
论文作者
论文摘要
暗物质 - 巴里昂相互作用可以冷却重液液，该液体已显示可修饰宇宙学21-CM全球信号。我们表明，在具有相互作用的毫米成分的两个组分黑暗扇区中，暗物质 - 巴里子散射可以产生带有声振荡的21 cm功率谱信号。鉴于逼真的天体物理模型，该信号最多可以比$λ$ CDM宇宙学中预期的三个数量级。该模型为HERA或NENUFAR等近未实现实验提供了一个新的物理目标，该目标可能会发现或强烈限制假定边缘异常的暗物质解释。
Dark matter-baryon interactions can cool the baryonic fluid, which has been shown to modify the cosmological 21-cm global signal. We show that in a two-component dark sector with an interacting millicharged component, dark matter-baryon scattering can produce a 21-cm power spectrum signal with acoustic oscillations. The signal can be up to three orders of magnitude larger than expected in $Λ$CDM cosmology, given realistic astrophysical models. This model provides a new-physics target for near-future experiments such as HERA or NenuFAR, which can potentially discover or strongly constrain the dark matter explanation of the putative EDGES anomaly.
