@Article{Caputo_etal2021, author="Caputo, A. and Liu, H. W. and Mishra-Sharma, S. and Pospelov, M. and Ruderman, J. T. and Urbano, A.", title="Edges and Endpoints in 21-cm Observations from Resonant Photon Production", journal="Physical Review Letters", year="2021", publisher="Amer Physical Soc", volume="127", number="1", pages="011102--7pp", abstract="We introduce a novel class of signatures-spectral edges and end points-in 21-cm measurements resulting from interactions between the standard and dark sectors. Within the context of a kinetically mixed dark photon, we demonstrate how resonant dark photon-to-photon conversions can imprint distinctive spectral features in the observed 21-cm brightness temperature, with implications for current, upcoming, and proposed experiments targeting the cosmic dawn and the dark ages. These signatures open up a qualitatively new way to look for physics beyond the Standard Model using 21-cm observations.", optnote="WOS:000669052600001", optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=4885), last updated on Wed, 14 Jul 2021 07:58:26 +0000", issn="0031-9007", doi="10.1103/PhysRevLett.127.011102", opturl="https://arxiv.org/abs/2009.03899", opturl="https://doi.org/10.1103/PhysRevLett.127.011102", language="English" }