https://doi.org/10.1051/epjconf/202227104001
Recent progress and future prospects of hyperon nucleon scattering experiment
1. Graduate School of Science, Tohoku University
2. Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK)
3. Department of Physics, Kyoto University
4. Advanced Science Research Center (ASRC), Japan Atomic Energy Agency (JAEA)
5. Department of Physics, Korea University
6. OMEGA Ecole Polytechnique-CNRS/IN2P3
7. High Energy Nuclear Physics Laboratory, RIKEN
8 Joint Institute for Nuclear Research (JINR), Dubna
9 Department of Physics, Osaka University
10 Research Center for Nuclear Physics (RCNP), Osaka University
11 Department of Physics, Chiba University
12 Georgian Technical University (GTU)
13 Department of Physics, Okayama University
14 Meson Science Laboratory, Cluster for Pioneering Research, RIKEN
15 Nishina Center for Accelerator-based Science, RIKEN
* e-mail: miwa9@lambda.phys.tohoku.ac.jp
** Present institution : Graduate Shook of Science, University of Tokyo
*** Present institution : International Center for Synchrotron Radiation Innovation Smart, Tohoku University
Published online: 9 November 2022
A new hyperon-proton scattering experiment, dubbed J-PARC E40, was performed to measure differential cross sections of the Σ+p, Σ−p elastic scatterings and the Σ−p → Λn scattering by identifying a lot of Σ particles in the momentum ranging from 0.4 to 0.8 GeV/c produced by the π±p → K+Σ± reactions. We successfully measured the differential cross sections of these three channels with a drastically improved accuracy with a fine angular step. These new data will become important experimental constraints to improve the theories of the two-body baryon-baryon interactions. Following this success, we proposed a new experiment to measure the differential cross sections and spin observables by using a highly polarized Λ beam for providing quantitative information on the ΛN interaction. The results of three Σp channels and future prospects of the Λp scattering experiment are described.
© The Authors, published by EDP Sciences, 2022
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