Abstract
The PADME experiment at the DAΦNE Beam-Test Facility (BTF) of the INFN Laboratory of Frascati is designed to search for invisible decays of dark sector particles produced in electron-positron annihilation events with a positron beam and a thin fixed target, by measuring the missing mass of single-photon final states. The presence of backgrounds originating from beam halo particles can significantly reduce the sensitivity of the experiment. To thoroughly understand the origin of the beam background contribution, a detailed Geant4-based Monte Carlo simulation has been developed, containing a full description of the detector together with the beam line and its optical elements. This simulation allows the full interactions of each particle to be described, both during beam line transport and during detection, a possibility which represents an innovative way to obtain reliable background predictions.
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Acknowledgments
We warmly thank all of the BTF and LINAC teams of Laboratori Nazionali di Frascati for providing an excellent quality beam and full support during data taking and simulation development.
This work is partly supported by the BG-NSF KP-06-DO02/4 from 15.12.2020 as part of MUCCA, CHIST-ERA-19-XAI-009, and TA-LNF as part of STRONG-2020 EU Grant Agreement 824093 projects.
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The PADME collaboration., Bossi, F., Branchini, P. et al. The PADME beam line Monte Carlo simulation. J. High Energ. Phys. 2022, 233 (2022). https://doi.org/10.1007/JHEP09(2022)233
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DOI: https://doi.org/10.1007/JHEP09(2022)233