Speaker
Description
The PADME experiment at the Frascati Beam-Test Facility (BTF) aim at searching for invisible decays of a dark photon A’, by measuring the missing mass in fixed-target annihilations of a positron beam: e+ e- A’. The measurement requires a precise determination of the momentum of the recoil photon, performed by means of a highly-segmented, high-resolution and low-threshold BGO crystal calorimeter, complemented by a fast, high-efficiency, fast Cherenkov calorimeter, for recovering very small angle photon events, at the same time fighting the Bremsstrahlung and three-photons decay background. Stringent requirements on the efficiency, resolution and timing performance push the design of calorimeters, also from the point of view of mechanical construction, readout and calibration.
