Very Asymmetric Collider for Dark Matter Search below 1 GeV

B. Wojtsekhowski, V. S. Morozov, Y. S. Derbenev

Current searches for a dark photon in the mass range below 1 GeV require an electron-positron collider with a luminosity at the level of at least $10^{34}$ cm${}^{-2}$s${}^{-1}$. The c…