Study of hadron mass origin through simultaneous measurements of generations and decays of meson bound states in nucleus
| Project/Area Number |
23244048
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | High Energy Accelerator Research Organization |
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Principal Investigator |
OZAWA Kyoichiro 大学共同利用機関法人高エネルギー加速器研究機構, 素粒子原子核研究所, 准教授 (20323496)
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥45,760,000 (Direct Cost: ¥35,200,000、Indirect Cost: ¥10,560,000)
Fiscal Year 2013: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2012: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2011: ¥38,870,000 (Direct Cost: ¥29,900,000、Indirect Cost: ¥8,970,000)
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| Keywords | 実験核物理 / ハドロン質量起源 / カイラル対称性 / 対称性の自発的破れ / ω中間子 / γ線検出器 / 円筒型ドリフトチェンバー / MPPC / 実験核物理学 |
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| Research Abstract |
In this research project, we perform an experiment to study a process of a dynamical mass generation of hadrons. The experiment aims to measure clearly bind states and invariant mass spectra of omega mesons in nucleus, simultaneously. Detectors used in the experiment are gamma-ray detectors (BGO EGG), thin scintillators and a cylindrical drift chamber (CDC). The CDC has a narrow drift length (1.25mm) and it is difficult to design and manufacture the CDC. Constructions of these detectors are finished. We evaluate performances of these detectors using a gamma-ray beam at Spring-8. The detectors show enough performances for our experiment. Achieved energy resolution of the BGO EGG for a gamma-ray of 1 GeV energy is 1.2 % and a reconstruction of neutral pi meson is already succeeded using data taken at Spring-8. Physics data to search for a bind state of omega mesons in nucleus are collected using a carbon target and a gamma-ray beam at Spring-8 LEPSII.
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Report
(4 results)
Research Products
(37 results)
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[Journal Article] Experimental Investigation for Mass Modification of Vector Mesons at J-PARC2014
Author(s)
D. Kawama, K. Aoki, Y. Aramaki, H. En' yo, H. Hamagaki, J. Kanaya, K. Kanno, A. Kiyomichi, Y. Komatsu, S. Masumoto, Y. Morino, H. Murakami, R. Muto, W.
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Journal Title
JPS Conference Proceedings
Volume: 1
Pages: 013074-013074
DOI
Related Report
Peer Reviewed
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[Journal Article] A Development of the GEM tracker for the J-PARC E16 experiment2013
Author(s)
Yusuke Komatsu, Kazuya Aoki, Yoki Aramaki, Hideto En'yo, Koki Kanno, Daisuke Kawama, Shinichi Masumoto, Wataru Nakai, Yuki Obara, Kyoichiro Ozawa, Michiko Sekimoto, Takuya Shibukawa, Tomonori Takahashi, Yosuke Watanabe, Satoshi Yokkaichi
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Journal Title
Nuclear Instruments and Methods in Physics Research, A
Volume: 732
Pages: 241-244
DOI
Related Report
Peer Reviewed
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