Measurement of the π− -Ar total hadronic cross section at the LArIAT experiment Gramellini, E. García Gámez, Diego LarIAT Collaboration We present the first measurement of the negative pion total hadronic cross section on argon in a restricted phase space, which we performed at the Liquid Argon In ATestbeam (LArIAT) experiment. All hadronic reaction channels, as well as hadronic elastic interactions with scattering angle greater than 5° are included. The pions have kinetic energies in the range 100–700 MeVand are produced by a beam of charged particles impinging on a solid target at the Fermilab test beam facility. LArIAT employs a 0.24 ton active mass liquid argon time projection chamber (LArTPC) to measure the pion hadronic interactions. For this measurement, LArIAT has developed the “thin slice method,” a new technique to measure cross sections with LArTPCs. While moderately higher, our measurement of the π−-Ar total hadronic cross section is generally in agreement with the GEANT4 prediction. 2023-01-18T08:01:55Z 2023-01-18T08:01:55Z 2022-09-22 journal article Gramellini, E... [et al.]. Measurement of the π− -Ar total hadronic cross section at the LArIAT experiment. PHYSICAL REVIEW D 106, 052009 (2022). DOI: [10.1103/PhysRevD.106.052009] https://hdl.handle.net/10481/79074 10.1103/PhysRevD.106.052009 eng http://creativecommons.org/licenses/by-nc-nd/4.0/ open access Attribution-NonCommercial-NoDerivatives 4.0 Internacional American Physical Society