Search for Bosonic Dark Matter Using the iDREAM Neutrino Detector at the Kalinin Nuclear Power Plant

The results of the search for ‘‘dark’’ bosons using the iDREAM neutrino detector at the Kalinin NPP are presented. Based on data on the composition of the VVER-1000 reactor core and the fission fractions of the main fissile isotopes, the spectrum of \(\gamma\)-radiation in the core has been calculated. Assuming that dark bosons can be produced in the reactor core via \(\gamma\)-scattering on electrons and subsequently detected by the iDREAM detector in the inverse process, model-independent experimental constraints on the coupling constant of (pseudo)scalar dark bosons with charged leptons of the Standard Model, \(g_{X}\), have been established.