Stefan Knirck, Gabe Hoshino, Mohamed H Awida, Gustavo I Cancelo, Martin Di Federico, Benjamin Knepper, Alex Lapuente, Mira Littmann, David W Miller, Donald V Mitchell, Derrick Rodriguez, Mark K Ruschman, Matthew A Sawtell, Leandro Stefanazzi, Andrew Sonnenschein, Gary W Teafoe, Daniel Bowring, G Carosi, Aaron Chou, Clarence L Chang, Kristin Dona, Rakshya Khatiwada, Noah A Kurinsky, Jesse Liu, Cristián Pena, Chiara P Salemi, Christina W Wang, Jialin Yu
We present first results from a dark photon dark matter search in the mass range from 44 to 52 μeV (10.7-12.5 GHz) using a room-temperature dish antenna setup called GigaBREAD. Dark photon dark matter converts to ordinary photons on a cylindrical metallic emission surface with area 0.5 m^{2} and is focused by a novel parabolic reflector onto a horn antenna. Signals are read out with a low-noise receiver system. A first data taking run with 24 days of data does not show evidence for dark photon dark matter in this mass range, excluding dark photon photon mixing parameters χ≳10^{-12} in this range at 90% confidence level...
March 29, 2024: Physical Review Letters