EPJ Web of Conferences (Jan 2022)

Recent progress and future prospects of hyperon nucleon scattering experiment

  • Miwa Koji,
  • Nanamura Takuya,
  • Sakao Tamao,
  • Ahn J. K.,
  • Akazawa Y.,
  • Aramaki T.,
  • Ashikaga S.,
  • Callier S.,
  • Chiga N.,
  • Chiga N.,
  • Choi S. W.,
  • Ekawa H.,
  • Evtoukhovitch P.,
  • Fujioka N.,
  • Fujita M.,
  • Gogami T.,
  • Harada T.,
  • Hasegawa S.,
  • Hayakawa S. H.,
  • Honda R.,
  • Hoshino S.,
  • Hosomi K.,
  • Ichikawa M.,
  • Ichikawa Y.,
  • Ieiri M.,
  • Ikedai M.,
  • Imai K.,
  • Ishikawa Y.,
  • Ishimoto S.,
  • Jung W. S.,
  • Kajikawa S.,
  • Kanauchi H.,
  • Kanda H.,
  • Kitaoka T.,
  • Kang B. M.,
  • Kawai H.,
  • Kim S. H.,
  • Kobayashi K.,
  • Koike T.,
  • Matsuda K.,
  • Matsumoto Y.,
  • Nagao S.,
  • Nagatomi R.,
  • Nakada Y.,
  • Nakagawa M.,
  • Nakamura I.,
  • Naruki M.,
  • Ozawa S.,
  • Raux L.,
  • Rogers T. G.,
  • Sakaguchi A.,
  • Sako H.,
  • Sato S.,
  • Shiozaki T.,
  • Shirotori K.,
  • Suzuki K. N.,
  • Suzuki S.,
  • Tabata M.,
  • Taille C. d. L.,
  • Takahashi H.,
  • Takahashi T.,
  • Takahashi T. N.,
  • Tamura H.,
  • Tanaka M.,
  • Tanida K.,
  • Tsamalaidze Z.,
  • Ukai M.,
  • Umetsu H.,
  • Wada S.,
  • Yamamoto T. O.,
  • Yoshida J.,
  • Yoshimura K.

DOI
https://doi.org/10.1051/epjconf/202227104001
Journal volume & issue
Vol. 271
p. 04001

Abstract

Read online

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.