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Miwa, K; Ahn, J K; Akazawa, Y; Aramaki, T; Ashikaga, S; Callier, S; 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; Ikeda, 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; Nanamura, T; Naruki, M; Ozawa, S; Raux, L; Rogers, T G; Sakaguchi, A; Sakao, T; 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
Physical review letters, 02/2022, Letnik: 128, Številka: 7Journal Article
The differential cross sections of the Σ^{-}p→Λn reaction were measured accurately for the Σ^{-} momentum (p_{Σ}) ranging from 470 to 650 MeV/c at the J-PARC Hadron Experimental Facility. Precise angular information about the Σ^{-}p→Λn reaction was obtained for the first time by detecting approximately 100 reaction events at each angular step of Δcosθ=0.1. The obtained differential cross sections show a slightly forward-peaking structure in the measured momentum regions. The cross sections integrated for -0.7≤cosθ≤1.0 were obtained as 22.5±0.68 statistical error(stat.) ±0.65 systematic error(syst.) mb and 15.8±0.83(stat)±0.52(syst) mb for 470<p_{Σ}(MeV/c)<550 and 550<p_{Σ}(MeV/c)<650, respectively. These results show a drastic improvement compared with past measurements of the hyperon-proton scattering experiments. They will play essential roles in updating the theoretical models of the baryon-baryon interactions.
