4 papers
Combined Evidence for the Boson After PADME Results on Resonant Production in Positron Annihilation
Fernando Arias-Aragón, Giovanni Grilli di Cortona, Enrico Nardi +1
The Positron Annihilation into Dark Matter Experiment at the Laboratori Nazionali di Frascati has reported an excess of final-state events from positron annihilation on fi…
Unveiling atomic electron motion effects in high energy collisions at NA64
Fernando Arias-Aragón, Giovanni Grilli di Cortona, Enrico Nardi
Atomic electron motion is responsible for well-studied effects observed in low-energy (MeV-scale) processes. Recently, interest in this phenomenon has also emerged within the high-…
Atoms as Electron Accelerators for New Physics Searches
Fernando Arias-Aragón, Giovanni Grilli di Cortona, Enrico Nardi +1
Due to Heisenberg's uncertainty principle, atomic electrons localized around the nucleus exhibit a characteristic momentum distribution that, in elements with high atomic number, r…
Blind unblinding procedure for the PADME X17 data sample
Susanna Bertelli, Fabio Bossi, Riccardo De Sangro +29
The PADME experiment at the Frascati DANE LINAC has performed a search for the hypothetical X17 particle, with a mass of around 17 MeV, by scanning the energy of a positron bea…