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An event mixing technique for Bose-Einstein correlations of two pions in photoproduction around 1 GeV

Chinese Physics C 2016年第11期40卷 67-74页

作者：何庆华 h.Fujimura h.fukasawa R.hashimoto Y.honda T.Ishikawa 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 S.Ogushi Y.Okada 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 Research Center for Electron Photon Science Tohoku University Institute of Fluid Physics China Academy of Engineering Physics Department of Physics Wakayama Medical University Department of Physics Yamagata University Department of Information Science Tohoku Gakuin University Department of Physics Tohoku University Department of Physics University of Tokyo Accelerator Laboratory KEK Institute of Particle and Nuclear Studies KEK Wakasa-wan Energy Research Center

We have developed an event mixing technique to observe Bose-Einstein correlations （BEC） between two identical neutral pions produced in photo-induced reactions in the non-perturbative QCD energy region. It is found that the missing-mass consistency cut and the pion-energy cut are essential for the event mixing method to effectively extract BEC observables. A Monte Carlo （MC） simulation is used to validate these constraints and confirms the efficiency of this method. Our work paves the way for similar BEC studies at lower energies where the multiplicity of emitted bosons is limited.

关键词： Bose-Einstein correlations photoproduction event mixing

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π~0 Photoproduction on Deuteron for Photon Energies from 0.6 to 1.15 GeV

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原子核物理评论 2009年第S1期26卷 104-108页

作者： F.Miyahara h.fukasawa R.hashimoto T.Ishikawa M.Itoh T.Iwata h.Kanda J.Kasagi h.Kato T.Kinoshita K.Maeda M.Matsuzawa T.Michigami K.Motiduki K.Murakami T.Nakabayashi K.Nawa T.Nomura K.Okamura h.Okamura h.Okuyama Y.Onodera Y.Saito T.Sasaki h.Shimizu T.Shishido S.Suzuki K.Suzuki Y.Tajima S.Takita T.Takahashi h.Ueno S.Yamaguchi h.Yamazaki h.Y.Yoshida Laboratory of Nuclear Science Tohoku University Mikamine 1-2-1 Cyclotoron and Radioisotope Center Tohoku University Department of Physics Yamagata University Department of Physics Tohoku University Research Center for Nuclear Physics Osaka University KEK

Differential and total cross sections of the γp→π0p and the γd→π0pn reaction were measured for photon energies between 640 and 1 150 MeV. The data have been compared with SAID and MAID model calculations. π0 photoproduction on the deuteron shows a strong suppression of the 2nd resonance which is clearly seen in the γp→π0p reaction.

关键词： pion photoproduction resonance

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Efficacy and Tolerability of Second-Line Metronidazole Triple Therapy Using Vonoprazan for helicobacter pylori Eradication in Japan—Comparative Study: Vonoprazan vs. Proton Pump Inhibitors

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Open Journal of Gastroenterology 2018年第1期8卷 27-38页

作者： Masahiko Ohtaka Mika Miura Mitsuhiko hanawa Yuichi hirose Atsuko Kitahashi Naoki Imamura Ikko Watanabe Kazuhiko Takaso Naoki Shimura Yoshioki Yoda Ichiro Takayama Mitsuharu fukasawa Nobuyuki Enomoto Yamanashi Koseiren health Care Center Yamanashi Japan First Department of Internal Medicine Graduate School of Medical and Engineering Science University of Yamanashi Yamanashi Japan health Care Center University of Yamanashi Yamanashi Japan

Aim: To investigate the efficacy and tolerability of second-line metronidazole triple therapy with vonoprazan (VPZ) for helicobacter pylori (h. pylori). Methods: We retrospectively reviewed medical records of patients who experienced clarithromycin triple therapy failure and were treated with second-line (20 mg VPZ (n = 274)/30 mg lansoprazole (n = 323) or 10 mg rabeprazole (n = 141) twice daily, 750 mg amoxicillin twice daily, 250 mg metronidazole twice daily for 7 days) eradication therapies. Successful eradication rates were compared between two groups: those receiving VPZ and those receiving a proton pump inhibitor (PPI). Adverse events were also investigated. Results: Successful second-line eradication rates according to ITT analysis and PP analysis, respectively, were 79.9% and 92.4% for VPZ therapy and 83.6% and 93.3% for PPI therapy. There were no significant differences between treatment groups. The eradication rates in those who had received first-line VPZ therapy previously according to ITT and PP analysis were 75.2% and 88.1%, respectively;in contrast, values were 82.5% and 95.4%, respectively, for those who had received first-line PPI therapy previously. In second-line therapy, the overall adverse event rate for VPZ therapy was the same as for PPI therapy. Conclusions: The efficacy and tolerability of metronidazole-containing second-line triple therapy with VPZ or a PPI were equivalent.

关键词： Vonoprazan Metronidazole Proton Pump Inhibitor Second-Line Eradication helicobacter pylori

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