%0 Journal Article
%T Edges and Endpoints in 21-cm Observations from Resonant Photon Production
%A Caputo, A.
%A Liu, H. W.
%A Mishra-Sharma, S.
%A Pospelov, M.
%A Ruderman, J. T.
%A Urbano, A.
%J Physical Review Letters
%D 2021
%V 127
%N 1
%I Amer Physical Soc
%@ 0031-9007
%G English
%F Caputo_etal2021
%O WOS:000669052600001
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=4885), last updated on Wed, 14 Jul 2021 07:58:26 +0000
%X 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.
%R 10.1103/PhysRevLett.127.011102
%U https://arxiv.org/abs/2009.03899
%U https://doi.org/10.1103/PhysRevLett.127.011102
%P 011102-7pp