K
K. Nawa
Researcher at Tohoku University
Publications - 28
Citations - 335
K. Nawa is an academic researcher from Tohoku University. The author has contributed to research in topics: Meson & Pion. The author has an hindex of 9, co-authored 28 publications receiving 278 citations.
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Journal ArticleDOI
Photoproduction of η mesons off protons for E γ ⩽1.15 GeV
T. Nakabayashi,H. Fukasawa,R. Hashimoto,T. Ishikawa,T. Iwata,Hiroki Kanda,Jirohta Kasagi,Toyohiko Kinoshita,Kazushige Maeda,Fusashi Miyahara,K. Nawa,Tetsuhiko Nomura,Hajime Shimizu,T. Shishido,Koutaku Suzuki,Yasuhisa Tajima,T. Takahashi,H. Ueno,Hirohito Yamazaki,Hiroshi Yoshida +19 more
TL;DR: In this article, the angular distributions obtained and the excitation function of the reaction are essentially in good agreement with previously reported ones and are well explained by \ensuremath{\eta}-MAID calculations.
Journal ArticleDOI
Narrow Resonance at Eγ = 1020 MeV in the D(γ,η)pn Reaction
Fusashi Miyahara,Jirohta Kasagi,T. Nakabayashi,H. Fukasawa,R. Hashimoto,Takatsugu Ishikawa,Takahiro Iwata,Hiroki Kanda,Toyohiko Kinoshita,Kazushige Maeda,K. Nawa,T. Nomura,Hajime Shimizu,T. Shishido,Koutaku Suzuki,Yasuhisa Tajima,Tadayuki Takahashi,H. Ueno,Hirohito Yamazaki,Hiroshi Yoshida +19 more
TL;DR: Differential and total cross sections of the D(γ, η)pn reaction have been measured for photon energies between 600 and 1150 MeV in this paper, which provides the information of the γn → ηn reaction above Eγ ≥ 800 MeV.
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First measurement of coherent double neutral-pion photoproduction on the deuteron at incident energies below 0.9 GeV
Takatsugu Ishikawa,H. Fujimura,H. Fukasawa,R. Hashimoto,Q. He,Yuki Honda,Takahiro Iwata,S. Kaida,Hiroki Kanda,Jirohta Kasagi,A. Kawano,S. Kuwasaki,Kazushige Maeda,Shinichi Masumoto,Manabu Miyabe,Fusashi Miyahara,K. Mochizuki,Norihito Muramatsu,A. Nakamura,K. Nawa,S. Ogushi,Y. Okada,K. Okamura,Y. Onodera,Kyoichiro Ozawa,Y. Sakamoto,Mitsuhiro Sato,Hajime Shimizu,H. Sugai,Koutaku Suzuki,Yasuhisa Tajima,Y. Taniguchi,Yusuke Tsuchikawa,H. Yamazaki,R. Yamazaki,Hiroshi Yoshida +35 more
TL;DR: In this article, the total cross sections were measured for coherent double neutral-pion photoproduction on the deuteron at incident energies below 0.9 GeV for the first time.
Journal ArticleDOI
The second GeV tagged photon beamline at ELPH
Takatsugu Ishikawa,H. Fujimura,R. Hashimoto,T. Ishida,Jirohta Kasagi,Toyohiko Kinoshita,S. Kuwasaki,Fusashi Miyahara,A. Miyamoto,K. Mochizuki,T. Nakabayashi,M. Nanao,K. Nawa,Y. Okada,K. Okamura,Y. Onodera,Yoshiro Saito,K. Satou,M. Sengoku,Hajime Shimizu,Koutaku Suzuki,Shoji Suzuki,Yasuhisa Tajima,Tsutomu Takahashi,Hirohito Yamazaki,H. Yonemura,Hiroshi Yoshida +26 more
Abstract: The second GeV bremsstrahlung photon beamline has been constructed for meson photo-production experiments at Research Center for Electron Photon Science, Tohoku University, where a 1200 MeV electron synchrotron called STretcher Booster (STB) has been in operation primarily for Quark Nuclear Physics. An internal radiator is employed to produce the bremsstrahlung photon beam out of circulating electrons in the STB ring. A photon tagging system is placed inside one of the bending magnets of the ring. The tagged energy of the photon beam ranges from 740 to 1150 MeV for 1200 MeV operation of the STB synchrotron. The details of the tagging system and the characteristics of the photon beam are described.
Journal ArticleDOI
Non-strange dibaryons studied in the γd → π0π0d reaction
Takatsugu Ishikawa,H. Fujimura,H. Fukasawa,R. Hashimoto,Q. He,Yuki Honda,T. Iwata,S. Kaida,Hiroki Kanda,Jirohta Kasagi,A. Kawano,S. Kuwasaki,Kazushige Maeda,Shinichi Masumoto,Manabu Miyabe,Fusashi Miyahara,K. Mochizuki,Norihito Muramatsu,A. Nakamura,K. Nawa,S. Ogushi,Y. Okada,K. Okamura,Y. Onodera,Kyoichiro Ozawa,Y. Sakamoto,Mitsuhiro Sato,Hajime Shimizu,H. Sugai,Koutaku Suzuki,Yasuhisa Tajima,Shinichiro Takahashi,Y. Taniguchi,Yusuke Tsuchikawa,Hiromichi Yamazaki,R. Yamazaki,Hiroshi Yoshida +36 more
TL;DR: In this article, the authors show strong evidence for the existence of an isovector dibaryon resonance with a mass of 2.14 ± 0.01 GeV / c 2, which is consistent with the theoretically predicted D 12 state, and also with the energy dependence of the πd partial-wave amplitude P 2 3 for the γ d → π ± d and π + d → p p reactions.