A search for hidden photon cold dark matter (HP CDM) using a new technique with a dish antenna is reported. From the result of the measurement, we found no evidence for the existence of HP CDM and set an upper limit on the photon-HP mixing parameter χ of ∼ 6 × 10 −12 for the hidden photon mass m γ = 3.1 ± 1.2 eV.
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Suzuki et al. (2015) studied this question.