Measurement of differential cross sections for Σ+p elastic scattering in the momentum range 0.44–0.80 GeV/c. (4th September 2022)

• Record Type: Journal Article
• Authors: Nanamura, T; 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 K; 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; 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;
• Is Part Of: Progress of theoretical and experimental physics. Volume 2022:Number 9(2022)
• Publication Date: 2022-09-04
• Subjects: D14; Physics -- Periodicals; Mathematical physics -- Periodicals; 530.05
• DOI: 10.1093/ptep/ptac101
• Languages: English
• ISSNs: 2050-3911

Abstract

Abstract: We performed a novel Σ + p scattering experiment at the J-PARC Hadron Experimental Facility. Approximately 2400 Σ + p elastic scattering events were identified from 4.9 × 10 7 tagged Σ + particles in the Σ + momentum range 0.44–0.80 GeV/ c . The differential cross sections of the Σ + p elastic scattering were derived with much better precision than in previous experiments. The obtained differential cross sections were approximately 2 mb/sr or less, which were not as large as those predicted by the fss2 and FSS models based on the quark cluster model in the short-range region. By performing phase-shift analyses for the obtained differential cross sections, we experimentally derived the phase shifts of the 3 S 1 and 1 P 1 channels for the first time. The phase shift of the 3 S 1 channel, where a large repulsive core was predicted owing to the Pauli effect between quarks, was evaluated as $20^\circ \lt |\delta _{^3S_1}|\lt 35^\circ$ . If the sign of $\delta _{^3S_1}$ is assumed to be negative, the interaction in this channel is moderately repulsive, as the Nijmegen extended-sort-core models predicted.