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Your search keyword '"S. Ashikaga"' showing total 5 results
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5 results on '"S. Ashikaga"'

1. Towards the Measurement of the Mass Modifications of Vector Mesons in a Finite Density Matter

Author

K. Ozawa, K. Aoki, D. Arimizu, S. Ashikaga, W.C. Chang, T. Chujo, K. Ebata, H. En'yo, S. Esumi, H. Hamagaki, R. Honda, M. Ichikawa, S. Kajikawa, K. Kanno, Y. Kimura, A. Kiyomichi, T.K. Kondo, S. Kyan, C.H. Lin, C.S. Lin, Y. Morino, H. Murakami, T.N. Murakami, R. Muto, W. Nakai, S. Nakasuga, M. Naruki, T. Nonaka, H. Noumi, T. Sakaguchi, H. Sako, F. Sakuma, S. Sato, S. Sawada, M. Sekimoto, K. Shigaki, K. Shirotori, H. Sugimura, T.N. Takahashi, Y. Takaura, R. Tatsumi, K. Tsukui, P.H. Wang, K. Yahiro, K.H. Yamaguchi, and S. Yokkaichi

Subjects
General Physics and Astronomy
Published
2022

2. Commissioning Runs of J-PARC E16 Experiment

Author

M. Ichikawa, K. Aoki, D. Arimizu, S. Ashikaga, W.-C. Chang, T. Chujo, K. Ebata, H. En’yo, S. Esumi, H. Hamagaki, R. Honda, S. Kajikawa, K. Kanno, Y. Kimura, A. Kiyomichi, T.K. Kondo, S. Kyan, C.-H. Lin, C.-S. Lin, Y. Morino, H. Murakami, T.N. Murakami, R. Muto, W. Nakai, S. Nakasuga, M. Naruki, T. Nonaka, H. Noumi, K. Ozawa, T. Sakaguchi, H. Sako, F. Sakuma, S. Sato, S. Sawada, M. Sekimoto, K. Shigaki, K. Shirotori, H. Sugimura, T.N. Takahashi, Y. Takaura, R. Tatsumi, K. Tsukui, P.-H. Wang, K. Yahiro, K.H. Yamaguchi, and S. Yokkaichi

Subjects
General Physics and Astronomy
Published
2023

3. Precise Measurement of Differential Cross Sections of the Σ^{-}p→Λn Reaction in Momentum Range 470-650 MeV/c

Author

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

Abstract

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 470p_{Σ}(MeV/c)550 and 550p_{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.

Published
2021

4. Recent progress and future prospects of hyperon nucleon scattering experiment

Author

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

Abstract

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.

Published
2022

5. Precise Measurement of Differential Cross Sections of the Σ^{-}p→Λn Reaction in Momentum Range 470-650  MeV/c.

Author

Miwa K, Ahn JK, Akazawa Y, Aramaki T, Ashikaga S, Callier S, Chiga N, Choi SW, Ekawa H, Evtoukhovitch P, Fujioka N, Fujita M, Gogami T, Harada T, Hasegawa S, Hayakawa SH, Honda R, Hoshino S, Hosomi K, Ichikawa M, Ichikawa Y, Ieiri M, Ikeda M, Imai K, Ishikawa Y, Ishimoto S, Jung WS, Kajikawa S, Kanauchi H, Kanda H, Kitaoka T, Kang BM, Kawai H, Kim SH, 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 TG, Sakaguchi A, Sakao T, Sako H, Sato S, Shiozaki T, Shirotori K, Suzuki KN, Suzuki S, Tabata M, Taille CDL, Takahashi H, Takahashi T, Takahashi TN, Tamura H, Tanaka M, Tanida K, Tsamalaidze Z, Ukai M, Umetsu H, Wada S, Yamamoto TO, Yoshida J, and Yoshimura K

Abstract

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

Published
2022
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