New limit on dark photon kinetic mixing in the
0.2–1.2μeV
mass range from the Dark E-field Radio experiment
Joseph Levine,
Benjamin Godfrey,
J. Anthony Tyson
et al.
Abstract:We report new limits on the kinetic mixing strength of the dark photon spanning the mass range 0.21−1.24 μeV corresponding to a frequency span of 50–300 MHz. The Dark E-field Radio experiment is a wideband search for dark photon dark matter. In this paper we detail changes in calibration and upgrades since our proof-of-concept pilot run. Our detector employs a wide-bandwidth E-field antenna moved to multiple positions in a shielded room, a low noise amplifier, wideband analog-to-digital converter, followed by… Show more
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