19–21 May 2025
University of Pittsburgh
US/Eastern timezone

New Sensitivity to Dark Photons from the 21-cm Power Spectrum

20 May 2025, 15:30
15m
David Lawrence Hall 104, University of Pittsburgh

David Lawrence Hall 104, University of Pittsburgh

Particle Cosmology Cosmology

Speaker

Ethan Baker (Boston University)

Description

Dark photons are dark massive vector gauge bosons that are one of the simplest extensions of the Standard Model. Through a kinetic mixing term, visible photons resonantly convert into dark photons when the plasma mass of an ionized gas is equal to the dark photon mass $m_{A'}$. This disappearance of Standard Model photons leaves a striking signature in a map of the 21-cm signal and enhances the 21-cm power spectrum. In this work, we analytically model the conversions from visible to dark photons in dark matter halos between $0.005 < z< 4$ and use 21cmFAST to simulate conversions that occur between $5

Authors

Ethan Baker (Boston University) Prof. Hongwan Liu (Boston University)

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