Motivated by possible theoretical extensions to the standard model, hidden photons (HP) are a suitable candidate for cold dark matter. Their possible masses cover a broad region, from 10-12 to 106 eV . Large scale direct detection experiments such as LUX-ZEPLIN (LZ), built primarily to detect WIMPs, could also be sensitive to HP dark matter via the so called hidden photoelectric effect in the keV-MeV mass scale . This work presents the study of the HP sensitivity reach of the LZ experiment in the 10-40 keV mass range.
 P.Arias, et al., JCAP06 (2012) 013, “WISPy cold dark matter”