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arXiv · 2205.03679

Search for Dark Photon Dark Matter in the Mass Range $74\mbox{--}110\,\mu\mathrm{eV}/c^2$ with a Cryogenic Millimeter-Wave Receiver

Shumpei Kotaka·Shunsuke Adachi·Ryo Fujinaka·Shunsuke Honda·Hironobu Nakata·Yudai Seino·Yoshinori Sueno·Toshi Sumida·Junya Suzuki·Osamu Tajima·Soichiro Takeichi
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Abstract

We search for the dark photon dark matter (DPDM) using a cryogenic millimeter-wave receiver. DPDM has a kinetic coupling with electromagnetic fields with a coupling constant of $\chi$, and is converted into ordinary photons at the surface of a metal plate. We search for signal of this conversion in the frequency range $18\text{--}26.5\,\mathrm{GHz}$, which corresponds to the mass range $74\text{--}110\,mu\mathrm{eV}/c^2$. We observed no significant signal excess, allowing us to set an upper bound of $\chi < (0.3\text{--}2.0)\times 10^{-10}$ at 95\% confidence level. This is the most stringent constraint to date, and tighter than cosmological constraints. Improvements from previous studies are obtained by employing a cryogenic optical path and a fast spectrometer.

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Shumpei Kotaka, Shunsuke Adachi, Ryo Fujinaka, Shunsuke Honda, Hironobu Nakata, Yudai Seino, Yoshinori Sueno, Toshi Sumida, Junya Suzuki, Osamu Tajima, Soichiro Takeichi. 2022-05-07. Search for Dark Photon Dark Matter in the Mass Range $74\mbox{--}110\,\mu\mathrm{eV}/c^2$ with a Cryogenic Millimeter-Wave Receiver. https://doi.org/10.1103/physrevlett.130.071805

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