Novel Way to Search for Light Dark Matter in Lepton Beam-Dump Experiments
Novel Way to Search for Light Dark Matter in Lepton Beam-Dump Experiments
A novel mechanism to produce and detect light dark matter in experiments making use of GeV electrons (and positrons) impinging on a thick target (beam dump) is proposed. The positron-rich environment produced by the electromagnetic shower allows us to produce an ${A}^{\ensuremath{'}}$ via nonresonant (${e}^{+}+{e}^{\ensuremath{-}}\ensuremath{\rightarrow}\ensuremath{\gamma}+{A}^{\ensuremath{'}}$) and resonant (${e}^{+}+{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{A}^{\ensuremath{'}}$) annihilation on …