NSR Query Results
Output year order : Descending NSR database version of May 6, 2024. Search: Author = N.Muramatsu Found 16 matches. 2023MU09 Phys.Rev. C 107, L042201 (2023) N.Muramatsu, for the LEPS2/BGOegg Collaboration First measurement of differential cross sections and photon beam asymmetries for photoproduction of the f0(980) meson decaying into π0π0 at Eγ < 2.4 GeV NUCLEAR REACTIONS 1H(polarized γ, p2π0), E=1.3-2.4 GeV; measured invariant mass spectra; deduced differential σ(θ, E), photon beam asymmetries in photoproduction of f0(980) meson decaying into π0π0. Detected all the final-state particles of the reaction γp --> f0(980)p --> π0π0p--> γγγγp. High-resolution electromagnetic calorimeter with 1320 BGO crystals in the BGOegg experiment at the LEPS2 beamline of SPring-8. Relevance to the structure of f0(980) meson.
doi: 10.1103/PhysRevC.107.L042201
2022IS02 Phys.Rev. C 105, 045201 (2022) T.Ishikawa, A.Fix, H.Fujimura, H.Fukasawa, R.Hashimoto, Q.He, Y.Honda, T.Iwata, S.Kaida, J.Kasagi, A.Kawano, S.Kuwasaki, K.Maeda, S.Masumoto, M.Miyabe, F.Miyahara, K.Mochizuki, N.Muramatsu, A.Nakamura, K.Nawa, Y.Obara, S.Ogushi, Y.Okada, K.Okamura, Y.Onodera, K.Ozawa, Y.Sakamoto, M.Sato, H.Shimizu, H.Sugai, K.Suzuki, Y.Tajima, S.Takahashi, Y.Taniguchi, Y.Tsuchikawa, H.Yamazaki, R.Yamazaki, H.Y.Yoshida Coherent photoproduction of the neutral-pion and η-meson on the deuteron at incident energies below 1.15 GeV NUCLEAR REACTIONS 2H(γ, π0ηd), E<1.15 GeV; measured reaction products, angular distributions, Eγ, Iγ, deuteron spectra, (particle)γ-coin; deduced σ(E), σ(θ, E), ηd scattering parameters, invariant mass. Comparison to other experimental data and model estimations. FOREST setup consisting of three different electromagnetic calorimeters (EMCs): 192 pure cesium iodide (CsI) crystals for the forward EMC, 252 lead scintillating-fiber sandwich modules for the central, and 62 lead-glass Cherenkov counters for the backward. Bremsstrahlung beam from the STretcher Booster (STB) ring synchrotron at the Research Center for Electron Photon Science (ELPH), Tohoku University, Japan.
doi: 10.1103/PhysRevC.105.045201
2021IS10 Phys.Rev. C 104, L052201 (2021) T.Ishikawa, H.Fujimura, H.Fukasawa, R.Hashimoto, Q.He, Y.Honda, T.Iwata, S.Kaida, J.Kasagi, A.Kawano, S.Kuwasaki, K.Maeda, S.Masumoto, M.Miyabe, F.Miyahara, K.Mochizuki, N.Muramatsu, A.Nakamura, K.Nawa, Y.Obara, S.Ogushi, Y.Okada, K.Okamura, Y.Onodera, K.Ozawa, Y.Sakamoto, M.Sato, H.Shimizu, H.Sugai, K.Suzuki, Y.Tajima, S.Takahashi, Y.Taniguchi, Y.Tsuchikawa, H.Yamazaki, R.Yamazaki, H.Y.Yoshida Resonance-like structure near the ηd threshold in the γd → π0ηd reaction NUCLEAR REACTIONS 2H(γ, π0ηd), E=0.75-1.15 GeV; measured final-state particles, total and differential σ(E) as a function of the incident photon energy, angular distributions for π0 with respect to the photon beam using FOREST detector consisting of three different electromagnetic calorimeters (EMCs) at the Research Center for Electron Photon Science (ELPH), Tohoku University; deduced S-wave resonance states and widths, strong enhancement near the ηd threshold. Comparison with previous experimental data.
doi: 10.1103/PhysRevC.104.L052201
2020IS04 Phys.Rev. C 101, 052201 (2020) T.Ishikawa, H.Fujimura, H.Fukasawa, R.Hashimoto, Q.He, Y.Honda, A.Hosaka, T.Iwata, S.Kaida, J.Kasagi, A.Kawano, S.Kuwasaki, K.Maeda, S.Masumoto, M.Miyabe, F.Miyahara, K.Mochizuki, N.Muramatsu, A.Nakamura, S.X.Nakamura, K.Nawa, S.Ogushi, Y.Okada, K.Okamura, Y.Onodera, K.Ozawa, Y.Sakamoto, M.Sato, T.Sato, H.Shimizu, H.Sugai, K.Suzuki, Y.Tajima, S.Takahashi, Y.Taniguchi, Y.Tsuchikawa, H.Yamazaki, R.Yamazaki, H.Y.Yoshida wN scattering length from w photoproduction on the proton near the reaction threshold NUCLEAR REACTIONS 1H(γ, ω), E=1.09-1.15 GeV; measured Eγ, Iγ, differential σ(θ), and total σ(Eγ) using the FOREST detector at the Research Center for Electron Photon Science of Tohoku University; deduced scattering parameters, spin-averaged scattering length, and effective range. Comparison with other experimental results and with theoretical predictions.
doi: 10.1103/PhysRevC.101.052201
2020MU12 Phys.Rev. C 102, 025201 (2020) N.Muramatsu, for the LEPS2/BGOegg Collaboration Differential cross sections, photon beam asymmetries, and spin density matrix elements of w photoproduction off the proton at Eγ = 1.3 - 2.4 GeV NUCLEAR REACTIONS 1H(polarized γ, pω), E=1.3-2.4 GeV; measured charged particles, γ rays produced in the decay of ω meson to π0+γ, and further to γγγ, photon beam asymmetries, differential σ(θ, E) using a large acceptance electromagnetic calorimeter BGOegg of 1320 BGO crystals, and charged-particle detectors at the SPring-8 LEPS2 beamline of Japan Synchrotron Radiation Institute; deduced distributions of π0γ invariant mass, spin density matrix elements. Comparisons with results from earlier experiments by GRAAL, LEPS, LEPS-NTPC, CLAS and CBELSA/TAPS Collaborations, and with partial-wave analysis by the Bonn-Gatchina group.
doi: 10.1103/PhysRevC.102.025201
2019MU15 Phys.Rev. C 100, 055202 (2019) N.Muramatsu, LEPS2/BGOegg Collaboration Measurement of neutral pion photoproduction off the proton with the large acceptance electromagnetic calorimeter BGOegg NUCLEAR REACTIONS 1H(polarized γ, π0p), E=1.3-2.4 GeV; measured photons, charged particles, differential σ(E, θ(π0)) and photon-beam asymmetries using the large-acceptance electromagnetic calorimeter BGOegg for 2γ photons from the decay of π0 and for the charged particles, the latter identified by inner plastic scintillators (IPS) at the LEPS2 beamline of SPring-8 synchrotron at Japan Synchrotron Radiation Research Institute. Comparison with previous experimental results from CLAS, CBELSA/TAPS, GRAAL, LEPS, Daresbury, CEA and Yerevan collaborations, and with partial wave analysis (PWA) model calculations.
doi: 10.1103/PhysRevC.100.055202
2017IS13 Phys.Lett. B 772, 398 (2017) T.Ishikawa, H.Fujimura, H.Fukasawa, R.Hashimoto, Q.He, Y.Honda, T.Iwata, S.Kaida, H.Kanda, J.Kasagi, A.Kawano, S.Kuwasaki, K.Maeda, S.Masumoto, M.Miyabe, F.Miyahara, K.Mochizuki, N.Muramatsu, A.Nakamura, K.Nawa, S.Ogushi, Y.Okada, K.Okamura, Y.Onodera, K.Ozawa, Y.Sakamoto, M.Sato, H.Shimizu, H.Sugai, K.Suzuki, Y.Tajima, Y.Taniguchi, Y.Tsuchikawa, H.Yamazaki, R.Yamazaki, H.Y.Yoshida First measurement of coherent double neutral-pion photoproduction on the deuteron at incident energies below 0.9 GeV NUCLEAR REACTIONS 2H(γ, π0), E<0.9 GeV; measured reaction products; deduced total σ. Comparison with theoretical calculations.
doi: 10.1016/j.physletb.2017.04.010
2017IS14 Acta Phys.Pol. B48, 1801 (2017) T.Ishikawa, K.Aoki, H.Fujioka, Y.Honda, T.Hotta, Y.Inoue, K.Itahashi, H.Kanda, H.Kawai, K.Maeda, Y.Matsumura, M.Miyabe, S.Miyata, N.Muramatsu, T.Nishi, H.Ohnishi, K.Ozawa, H.Shimizu, R.Shirai, M.Tabata, A.O.Tokiyasu, Y.Tsuchikawa, H.Yamazaki Low-energy Scattering Parameters Between the eta Meson and Nucleon from eta Photoproduction on the Deuteron NUCLEAR REACTIONS 2H(γ, nη), E=0.82-1.26 GeV; analyzed recoil η momentum vs incident bremsstrahlung Eγ; deduced η-n scattering length. More results in near future.
doi: 10.5506/APhysPolB.48.1801
2009NA02 Phys.Rev. C 79, 025210 (2009) T.Nakano, N.Muramatsu, D.S.Ahn, J.K.Ahn, H.Akimune, Y.Asano, W.C.Chang, S.Date, H.Ejiri, H.Fujimura, M.Fujiwara, S.Fukui, H.Hasegawa, K.Hicks, K.Horie, T.Hotta, K.Imai, T.Ishikawa, T.Iwata, Y.Kato, H.Kawai, Z.Y.Kim, K.Kino, H.Kohri, N.Kumagai, S.Makino, T.Matsuda, N.Matsuoka, T.Matsumura, T.Mibe, M.Miyabe, Y.Miyachi, M.Niiyama, M.Nomachi, Y.Ohashi, H.Ohkuma, T.Ooba, D.S.Oshuev, C.Rangacharyulu, A.Sakaguchi, P.M.Shagin, Y.Shiino, A.Shimizu, H.Shimizu, Y.Sugaya, M.Sumihama, Y.Toi, H.Toyokawa, A.Wakai, C.W.Wang, S.C.Wang, K.Yonehara, T.Yorita, M.Yoshimura, M.Yosoi, R.G.T.Zegers Evidence for theΘ+ in the γd → K+K- pn reaction by detecting K+K- pairs
doi: 10.1103/PhysRevC.79.025210
2008NI10 Phys.Rev. C 78, 035202 (2008) M.Niiyama, H.Fujimura, D.S.Ahn, J.K.Ahn, S.Ajimura, H.C.Bhang, T.H.Chang, W.C.Chang, J.Y.Chen, S.Date, S.Fukui, H.Funahashi, K.Hicks, K.Horie, T.Hotta, K.Imai, T.Ishikawa, Y.Kato, K.Kino, H.Kohri, S.Makino, T.Matsumura, T.Mibe, K.Miwa, M.Miyabe, N.Muramatsu, M.Nakamura, T.Nakano, Y.Nakatsugawa, Y.Ohashi, D.S.Oshuev, J.D.Parker, N.Saito, T.Sawada, Y.Sugaya, M.Sumihama, J.L.Tang, M.Uchida, C.W.Wang, T.Yorita, M.Yosoi Photoproduction of Λ(1405) and Σ0(1385) on the proton at Eγ=1.5-2.4 GeV NUCLEAR REACTIONS 1H(γ, K+)Λ/Σ, E=1.5-2.4 GeV; measured σ.
doi: 10.1103/PhysRevC.78.035202
2007SU23 Phys.Lett. B 657, 32 (2007) M.Sumihama, J.K.Ahn, H.Akimune, Y.Asano, W.C.Chang, S.Date, H.Ejiri, H.Fujimura, M.Fujiwara, K.Hicks, T.Hotta, K.Imai, T.Ishikawa, T.Iwata, H.Kawai, Z.Y.Kim, K.Kino, H.Kohri, N.Kumagai, S.Makino, T.Matsumura, N.Matsuoka, T.Mibe, M.Miyabe, Y.Miyachi, M.Morita, N.Muramatsu, T.Nakano, M.Niiyama, M.Nomachi, Y.Ohashi, H.Ohkuma, T.Ooba, D.S.Oshuev, C.Rangacharyulu, A.Sakaguchi, T.Sato, P.M.Shagin, Y.Shiino, H.Shimizu, Y.Sugaya, H.Toyokawa, A.Wakai, C.W.Wang, S.C.Wang, K.Yonehara, T.Yorita, M.Yosoi, R.G.T.Zegers Backward-angle photoproduction of π0 mesons on the proton at Eγ = 1.5-2.4 GeV NUCLEAR REACTIONS 1H(polarized γ, π0), E=1.5-2.4 GeV; measured missing mass spectra, σ(E, θ), beam asymmetry.
doi: 10.1016/j.physletb.2007.10.032
2005IS02 Phys.Lett. B 608, 215 (2005) T.Ishikawa, D.S.Ahn, J.K.Ahn, H.Akimune, W.C.Chang, S.Date, H.Fujimura, M.Fujiwara, K.Hicks, T.Hotta, K.Imai, H.Kawai, K.Kino, H.Kohri, T.Matsumura, T.Mibe, K.Miwa, M.Miyabe, M.Morita, T.Murakami, N.Muramatsu, H.Nakamura, M.Nakamura, T.Nakano, M.Niiyama, M.Nomachi, Y.Ohashi, T.Ooba, D.S.Oshuev, C.Rangacharyulu, A.Sakaguchi, Y.Shiino, Y.Sakemi, H.Shimizu, Y.Sugaya, M.Sumihama, Y.Toi, H.Toyokawa, C.W.Wang, T.Yorita, M.Yosoi, R.G.T.Zegers φ photo-production from Li, C, Al, and Cu nuclei at Eγ = 1.5-2.4 GeV NUCLEAR REACTIONS Li, C, Al, Cu(γ, X), E=1.5-2.4 GeV; measured kaon pair invariant mass spectra, φ mesons photoproduction σ; deduced target mass dependence, φ-nucleon interaction total σ.
doi: 10.1016/j.physletb.2005.01.023
2003MA65 Nucl.Phys. A721, 723c (2003) T.Matsumura, H.Kohri, T.Hotta, T.Nakano, T.Mibe, R.G.T.Zegers, M.Fujiwara, N.Muramatsu, T.Ishikawa, M.Miyabe, M.Niiyama, M.Sumihama, H.Nakamura, Y.Sugaya, H.Kawai, T.Ooba, Y.Shiino, P.M.Shagin, K.Hicks, C.Rangacharyulu, S.Date, Y.Ohashi, T.Yorita, Y.Tajima, H.Y.Yoshida, D.Oshuev, J.K.Ahn, J.Kasagi, T.Kinoshita, T.Nakabayashi, H.Yamazaki, H.Shimizu 2π0 photoproduction experiment at SPring-8 NUCLEAR REACTIONS H, C(γ, 2π0X), E=1.5-2.4 GeV; measured 4γ-cluster events invariant mass spectra.
doi: 10.1016/S0375-9474(03)01166-7
2003NA08 Phys.Rev.Lett. 91, 012002 (2003) T.Nakano, D.S.Ahn, J.K.Ahn, H.Akimune, Y.Asano, W.C.Chang, S.Date, H.Ejiri, H.Fujimura, M.Fujiwara, K.Hicks, T.Hotta, K.Imai, T.Ishikawa, T.Iwata, H.Kawai, Z.Y.Kim, K.Kino, H.Kohri, N.Kumagai, S.Makino, T.Matsumura, N.Matsuoka, T.Mibe, K.Miwa, M.Miyabe, Y.Miyachi, M.Morita, N.Muramatsu, M.Niiyama, M.Nomachi, Y.Ohashi, T.Ooba, H.Ohkuma, D.S.Oshuev, C.Rangacharyulu, A.Sakaguchi, T.Sasaki, P.M.Shagin, Y.Shiino, H.Shimizu, Y.Sugaya, M.Sumihama, H.Toyokawa, A.Wakai, C.W.Wang, S.C.Wang, K.Yonehara, T.Yorita, M.Yoshimura, M.Yosoi, R.G.T.Zegers Evidence for a Narrow S = +1 Baryon Resonance in Photoproduction from the Neutron NUCLEAR REACTIONS 12C(γ, K+K-), E ≈ 1.5-2.4 GeV; measured kaon missing mass spectra; deduced baryon resonance features.
doi: 10.1103/PhysRevLett.91.012002
2003ZE04 Phys.Rev.Lett. 91, 092001 (2003) R.G.T.Zegers, M.Sumihama, D.S.Ahn, J.K.Ahn, H.Akimune, Y.Asano, W.C.Chang, S.Date, H.Ejiri, H.Fujimura, M.Fujiwara, K.Hicks, T.Hotta, K.Imai, T.Ishikawa, T.Iwata, H.Kawai, Z.Y.Kim, K.Kino, H.Kohri, N.Kumagai, S.Makino, T.Matsumura, N.Matsuoka, T.Mibe, K.Miwa, M.Miyabe, Y.Miyachi, M.Morita, N.Muramatsu, T.Nakano, M.Niiyama, M.Nomachi, Y.Ohashi, T.Ooba, H.Ohkuma, D.S.Oshuev, C.Rangacharyulu, A.Sakaguchi, T.Sasaki, P.M.Shagin, Y.Shiino, H.Shimizu, Y.Sugaya, H.Toyokawa, A.Wakai, C.W.Wang, S.C.Wang, K.Yonehara, T.Yorita, M.Yoshimura, M.Yosoi Beam-Polarization Asymmetries for the p(γ(pol), K+)Λ and p(γ(pol), K+)Σ0 Reactions for Eγ = 1.5-2.4 GeV NUCLEAR REACTIONS 1H(polarized γ, K+X), E=1.5-2.4 GeV; measured hyperon production associated beam polarization asymmetries. Comparison with model predictions.
doi: 10.1103/PhysRevLett.91.092001
2001NA15 Nucl.Phys. A684, 71c (2001) T.Nakano, J.K.Ahn, M.Fujiwara, H.Kohri, N.Matsuoka, T.Mibe, N.Muramatsu, M.Nomachi, H.Shimizu, K.Yonehara, M.Yosoi, T.Yorita, W.C.Chang, C.W.Wang, S.C.Wang, Y.Asano, T.Hotta, Y.Sugaya, R.Zegers, S.Date, N.Kumagai, Y.Ohashi, H.Ohkuma, H.Toyokawa, T.Iwata, M.Miyabe, Y.Miyachi, A.Wakai, K.Imai, T.Ishikawa, M.Miyabe, T.Sasaki, H.Kawai, T.Ooba, Y.Shiino, M.Wada, H.C.Bhang, Z.Y.Kim, A.Sakaguchi, M.Sumihama, K.Hicks, H.Akimune, T.Matsumura, C.Rangacharyulu, S.Makino Multi-GeV Laser-Electron Photon Project at SPring-8 NUCLEAR REACTIONS 1H(γ, X), E=high; measured particles invariant mass spectra; deduced φ meson production.
doi: 10.1016/S0375-9474(01)00490-0
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