Dark sector studies with the PADME experiment

Abstract

The Positron Annihilation to Dark Matter Experiment (PADME) uses the positron beam of the DA$\hat{I}¦$NE Beam-Test Facility, at the Laboratori Nazionali di Frascati (LNF) to search for a Dark Photon $A^{\prime }$. The search technique studies the missing mass spectrum of single-photon final states in $e^{+}{e}^{-}\to A^{\prime }{\hat{I}}^3$ annihilation in a positron-on-thin-target experiment. This approach facilitates searches for new particles such as long lived Axion-Like-Particles, protophobic X bosons and Dark Higgs. This talk illustrated the scientific program of the experiment and its first physics results. In particular, the measurement of the cross-section of the SM process $e^{+}{e}^{-}\to {\hat{I}}^3{\hat{I}}^3$ at $\sqrt{s}$=21 MeV was shown.

Fixed typos and updated gamma gamma results from preliminary ones to published ones. 6 pages, 6 figures, conference proceedings to be published in SciPost