Measurements of meson mass modification in nuclei due to the partial restoration of chiral symmetry
| Project/Area Number |
26247048
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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 | Institute of Physical and Chemical Research |
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Principal Investigator |
Yokkaichi Satoshi 国立研究開発法人理化学研究所, 仁科加速器研究センター, 専任研究員 (20360670)
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| Co-Investigator(Renkei-kenkyūsha) |
TAKAHASHI Tomonori 国立研究開発法人理化学研究所, 仁科加速器研究センター, 客員研究員 (80612134)
AOKI Kazuya 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, 助教 (70525328)
MORINO Yuhei 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, 助教 (50715240)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥40,820,000 (Direct Cost: ¥31,400,000、Indirect Cost: ¥9,420,000)
Fiscal Year 2016: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥36,920,000 (Direct Cost: ¥28,400,000、Indirect Cost: ¥8,520,000)
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| Keywords | 実験核物理 / 放射線X線粒子線 / GEM / チェレンコフ検出器 / 電子検出器 / 飛跡検出器 / カイラル対称性 / 量子色力学 / 放射線検出器 / チェレンコフ光検出器 |
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| Outline of Final Research Achievements |
The origin of hadron mass is thought to be due to the spontaneous breaking of chiral symmetry, not only the Higgs mechanism, as Nambu advocated. In order to obtain the experimental evidence of the idea, we proposed the systematic measurement of vector meson mass in nuclei with the world best resolution and statistics through the di-electron decay at J-PARC hadron experimental facility. In order to construct a spectrometer for the experiment, we have developed the GEM tracker, Hadron blind detector and read-out electronics, and produced a part of them which consist the spectrometer. Also, by the simulation based on the achieved performance of the developed detectors, we evaluated the sensitivity to the spectral modification of the phi meson using the limited number of the detectors, only eight modules out of 26 modules originally proposed.
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Report
(4 results)
Research Products
(44 results)
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[Journal Article] Development of a hadron blind detector using a finely segmented pad readout2016
Author(s)
Koki Kanno, Kazuya Aoki, Yoki Aramaki, Hideto En'yo, Daisuke Kawama, Yusuke Komatsu, 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: 819
Pages: 20-24
DOI
Related Report
Peer Reviewed / Acknowledgement Compliant
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[Journal Article] The electronics, online trigger system and data acquisition system of the J-PARC E16 experiment2015
Author(s)
T N Takahashi, E Hamada, M Ikeno, D Kawama, Y Morino, W Nakai, Y Obara, K Ozawa, H Sendai, M M Tanaka, T Uchida and S Yokkaichi
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Journal Title
Journal of Physics: Conference Series
Volume: 664
Issue: 8
Pages: 082056-082056
DOI
Related Report
Peer Reviewed / Open Access / Acknowledgement Compliant
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[Journal Article] Development of GEM trigger electronics for the J-PARC E16 experiment2015
Author(s)
Y. Obara, E. Hamada, M. Ikeno, D. Kawama, Y. Morino, W. Nakai, K. Ozawa, H. Sendai, T. N. Takahashi, M. M. Tanaka, T. Uchida and S. Yokkaichi
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Journal Title
Journal of Physics: Conference Series
Volume: 664
Issue: 8
Pages: 082043-082043
DOI
Related Report
Peer Reviewed / Open Access
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[Presentation] Hadron-mass modifications at J-PARC2016
Author(s)
Kyoichiro Ozawa
Organizer
International workshop on Progress on J-PARC hadron physics in 2016
Place of Presentation
IQBRC, Tokai, Ibaraki, Japan
Year and Date
2016-03-04
Related Report
Int'l Joint Research / Invited
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