Performance of the PADME calorimeter prototype at the DA$Φ$NE BTF
arXiv:1611.05649 · doi:10.1016/j.nima.2017.05.007
Abstract
The PADME experiment at the DA$Φ$NE Beam-Test Facility (BTF) aims at searching for invisible decays of the dark photon by measuring the final state missing mass in the process $e^+e^- \to γ+ A'$, with $A'$ undetected. The measurement requires the determination of the 4-momentum of the recoil photon, performed using a homogeneous, highly segmented BGO crystals calorimeter. We report the results of the test of a 5$\times$5 crystals prototype performed with an electron beam at the BTF in July 2016.