Abud, A. AbedAbi, B.Acciarri, R.Acero, M. A.Adames, M. R.Adamov, G.Adamowski, M.2024-03-132024-03-1320231434-60441434-6052https://doi.org/10.1140/epjc/s10052-023-11733-2https://hdl.handle.net/20.500.12662/3688The Pandora Software Development Kit and algorithm libraries provide pattern-recognition logic essential to the reconstruction of particle interactions in liquid argon time projection chamber detectors. Pandora is the primary event reconstruction software used at ProtoDUNE-SP, a prototype for the Deep Underground Neutrino Experiment far detector. ProtoDUNE-SP, located at CERN, is exposed to a charged-particle test beam. This paper gives an overview of the Pandora reconstruction algorithms and how they have been tailored for use at ProtoDUNE-SP. In complex events with numerous cosmic-ray and beam background particles, the simulated reconstruction and identification efficiency for triggered test-beam particles is above 80% for the majority of particle type and beam momentum combinations. Specifically, simulated 1 GeV/c charged pions and protons are correctly reconstructed and identified with efficiencies of 86.1 +/- 0.6% and 84.1 +/- 0.6%, respectively. The efficiencies measured for test-beam data are shown to be within 5% of those predicted by the simulation.eninfo:eu-repo/semantics/openAccessArticle10.1140/epjc/s10052-023-11733-22-s2.0-851652641697Q183WOS:001061746600005N/A