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The First Pion-Ar Cross-Section Measurement with the LArIAT Experiment

The First Pion-Ar Cross-Section Measurement with the LArIAT Experiment
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A complete understanding of neutrinos properties requires a study and a characterization of the interactions of the daughter particles created in a neutrino-nucleus interaction. The Liquid Argon In A Testbeam (LArIAT) experiment is a small-scale liquid argon detector situated in the Fermilab Test Beam Facility. The LArIAT experiment is exposed to a tertiary beam comprised of mostly pions along with a mix of muons, protons, kaons, and electrons. LArIAT's goal is to characterize the response of the LArTPC to known incoming charged particles and measure their interactions in Argon, in order to understand their cross-sections and to help developing and tuning simulations and reconstruction algorithms for LArTPC neutrino experiments. The world's rst measurement of a pion cross-section on an Argon target, made with the LArIAT detector, is presented here.

LArIAT

LArIAT
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The LArIAT experiment has performed the world's first measurement of the total charged-current pion cross-section on an argon target, using the repurposed ArgoNeuT detector in the Fermilab test beam. Presented here are the results of that measurement, along with an overview of the LArIAT experiment and details of the LArIAT collaboration's plans for future measurements.

Total Pion Cross Section Measurements. Annual Progress Report, January 1, 1979-December 31, 1979

Total Pion Cross Section Measurements. Annual Progress Report, January 1, 1979-December 31, 1979
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Release: 1980
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The principal effort has been devoted to the data analysis for the pion-nucleus total cross section experiment. Forward scattering amplitudes have been obtained for .pi.+- mesons on Al, 4°Ca, Cu, Sn, Ho, and Pb. These results are given. Work is continuing on the data reduction for the remaining targets.

Mid-rapidity Pion Cross Sections

Mid-rapidity Pion Cross Sections
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Release: 1981
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Pion production by collisions of relativistic heavy ions has been studied recently by Wolf et al. For the reaction 1.05 GeV/A 4°Ar + Ca .-->. .pi./sup +/, they discovered a peak in the invariant cross section at mid-rapidity at P/sub perpendicular/ approx. 0.5 m/sub .pi./c. This peak is not apparent in the 730 MeV p/sup +/p data of Cochran et al. and was attributed to possible hydrodynamic flow effects. Several authors have suggested that the .pi./sup +/ peak is a Coulomb effect. These models predict the .pi.− would be drawn in towards the fireball, leaving an essentially flat distribution in the mid-rapidity region. Mid-rapidity .pi./sup +/ and .pi.− cross sections were measured using a 1.05 GeV/A argon beam with a calcium target. The pions were measured with a magnetic spectrometer set at 15° to the beam and were stopped in a scintillator range telescope. Results are presented and discussed. (WHK).