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2 results on '"H. Akikawa"'

1. Measurement of Σ+p elastic scattering cross sections at KEK-PS

Author

T. Tabaru, Minoru Yoshida, H. En'yo, Hirohiko Sato, I. E. Kreslo, B. Bassalleck, Y. Goto, K. Ozawa, T. Hayakawa, Masaharu Ieiri, M. S. Chung, M. Hanabata, Kazuhiro Yamamoto, Hiroki Kanda, Tomokazu Fukuda, H. Funahashi, S. Yokkaich, Masaya Ishino, J. K. Ahn, S. V. Golovkin, H. Torii, P. Tlustý, H. Akikawa, E.N. Kozarenko, J. M. Lee, Kazuma Nakazawa, J. Arvieux, Fujio Takeutchi, K. S. Sim, K. Imai, A.M. Gorin, Y. Kondo, Satoshi Mihara, K. Nakai, A. K. Ichikawa, A. Masaike, A. Sato, and Yongsun Kim

Subjects
Physics, Elastic scattering, Scintillating fiber, Hydrogen, Scattering, Nuclear Theory, Hyperon, Proton Synchrotron, chemistry.chemical_element, Sigma baryon, Momentum, Nuclear physics, chemistry, Atomic physics, Nuclear Experiment
Abstract

An experiment to measure the Σ+p scattering cross sections was carried out at KEK 12 GeV proton synchrotron. A scintillating fiber active target system was used as a hydrogen target for the hyperon production and subsequent hyperon‐nucleon scattering. Out of 1.3 × 10 6 hyperon production events, 31 events were identified as Σ+p elastic scattering events in the momentum region of 350 ⩽ pΣ+ ⩽ 750 MeV/c. Differential cross sections in the angular region of −0.8 < cosθCM < 0.8 and integrated cross sections with respect to the incident momentum were obtained. They were compared with the theoretical calculations.

Published
2006
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2. Doubly strange nuclei by a hybrid-emulsion experiment E373 at KEK

Author

Masaharu Ieiri, M. Sekimoto, Y. S. Ra, G. B. Franklin, M. S. Chung, Y. Akaishi, Fujio Takeutchi, Kensuke Arai, P. K. Saha, T. Takahashi, C. Nagoshi, Adam Rusek, Hirotaka Takahashi, Y. S. Iwata, S. Torikai, N. Yasuda, Takayoshi Kawai, C. S. Yoon, H. Shibuya, Shigeki Aoki, Saewoong Bahk, Y. Yamamoto, Y. Kondo, D.N. Tovee, J. H. Chung, A. K. Ichikawa, J. T. Rhee, M. Yosoi, K. M. Baik, Kazuma Nakazawa, B. Bassalleck, Jinhu Yang, Hiroyuki Noumi, K. S. Sim, D. H. Davis, I. G. Park, Sanghoon Kim, Hajime Tanaka, H. Okabe, T. Yoshida, M. Kaneko, C. O. Kim, D. Seki, K. Imai, S. Ogawa, J. S. Song, C. J. Yoon, H. Torii, L. H. Zhu, Tomokazu Fukuda, H. Akikawa, J. K. Ahn, K. Tanida, M. Mitsuhara, T. Kouketsu, Y. H. Iwata, Toshio Motoba, Kazunuki Yamamoto, J. Y. Kim, Y. L. Lee, J. Parker, N. Ushida, K. Oyama, Junji Tojo, Y. Nagase, S. J. Kim, H. M. Park, J. W C McNabb, K. Hoshino, and H. Kanda

Subjects
Physics, Nuclear physics, Particle physics, Pion, Meson, Hyperon, Lambda baryon, Isotopes of beryllium, Hypernucleus, Isotopes of helium, Xi baryon
Abstract

A hybrid emulsion experiment E373 at KEK has been carried out to study doubly strange nuclear system. By the 8% data analysis of all, one twin single-Λ hypernuclei event and two events of double-Λ hypernucleus have been successfully detected. The twin single-Λ event is uniquely interpreted as Ⅺ−+14N→Λ5He+Λ5He+4He+n for the first time. In the first double-Λ hypernucleus event, “Demachi-Yanagi,” it is interpreted as Ⅺ−+12C→ΛΛ10Be* (or ΛΛ10Be*)+t. The second double-Λ hypernucleus event, “NAGARA,” shows a clearly recognized topology and the interpretation is unique as Ⅺ−+12C→ΛΛ6He+4He+t, ΛΛ6He→Λ5He+π−+p, Λ5He→p+d+2n etc. By the preliminary result of the ΛΛ6He, the attractive ΛΛ interaction has been confirmed with the ΔBΛΛ∼1 MeV.

Published
2001
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