%0 Generic %1 barkana2022anticipating %A Barkana, Rennan %A Fialkov, Anastasia %A Liu, Hongwan %A Outmezguine, Nadav Joseph %D 2022 %K library %T Anticipating a New-Physics Signal in Upcoming 21-cm Power Spectrum Observations %U http://arxiv.org/abs/2212.08082 %X 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 $Łambda$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.

@misc{barkana2022anticipating, abstract = {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 $\Lambda$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.}, added-at = {2022-12-19T09:32:33.000+0100}, author = {Barkana, Rennan and Fialkov, Anastasia and Liu, Hongwan and Outmezguine, Nadav Joseph}, biburl = {https://www.bibsonomy.org/bibtex/22d431200835215280ac8160024d3e21a/gpkulkarni}, description = {Anticipating a New-Physics Signal in Upcoming 21-cm Power Spectrum Observations}, interhash = {286f89f0b9ef285126368b9eba3788f2}, intrahash = {2d431200835215280ac8160024d3e21a}, keywords = {library}, note = {cite arxiv:2212.08082Comment: 5 pages + appendices, 2 figures}, timestamp = {2022-12-19T09:32:33.000+0100}, title = {Anticipating a New-Physics Signal in Upcoming 21-cm Power Spectrum Observations}, url = {http://arxiv.org/abs/2212.08082}, year = 2022 }