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Λ polarization measurement of the π−p → K0Λ reaction in J-PARC E40 experiment
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Λ polarization measurement of the π−p → K0Λ reaction in J-PARC E40 experiment
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Conference Proceeding
Λ polarization measurement of the π−p → K0Λ reaction in J-PARC E40 experiment
2022
Overview
We performed the J-PARC E40 experiment to measure the Σp scattering cross sections from 2018 to 2020. Together with the π−p → K+Σ− data, the π−p → K0Λ data were accumulated as a byproduct. The analysis confirmed that Λ could be identified with an S/N ratio of ∼ 2.67. The polarization of Λ(PΛ) was preliminarily derived as 1.009 ± 0.049 for the K0 angular range of 0.7 < cos θK0, CM < 0.8. It is more accurate than the past data [1]. The high polarization enables us to measure not only the differential cross section but also spin observables of the Λp scattering in the future J-PARC experiment.
Publisher
EDP Sciences
