Speaker
Description
Traditionally, dark matter exploration at accelerators has been conducted in the domain of high-energy experiments with, up-to-now, no positive results. The search of dark-matter candidates requires innovative and open-minded approaches spanning a wide range of energies with high-sensitivity detectors. In this scenario, attractive opportunities are offered to low energy machines and flavour experiments. The Positron Annihilation into Dark Matter Experiment (PADME) ongoing at the Laboratori Nazionali di Frascati of INFN is searching a Dark Photon signal by studying the missing-mass spectrum of single photon final states resulting from positrons annihilation on the electrons of a fixed target. PADME is expected to reach a sensitivity of up to $10^{-8}$ in $\epsilon^2$ (kinetic mixing coefficient) for low-mass Dark Photons (< 23.7MeV). In 2020 PADME collected $\approx 5\times 10^{12}$ POT at 430 MeV. Here we present the performance of the detector and the preliminary results of the ongoing analyses. These concern SM final states: $\gamma \gamma$-events and positron Bremsstrahlung.
