Study of meson mass origin by simultaneous measurements of production of omega bound states and its decays

• Project/Area Number: 20684008
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: The University of Tokyo
• Principal Investigator: OZAWA Kyoichiro The University of Tokyo, 大学院・理学系研究科, 講師 (20323496)
• Project Period (FY): 2008 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥22,750,000 (Direct Cost: ¥17,500,000、Indirect Cost: ¥5,250,000); Fiscal Year 2010: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000); Fiscal Year 2009: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2008: ¥15,990,000 (Direct Cost: ¥12,300,000、Indirect Cost: ¥3,690,000)
• Keywords: 原子核(実験) / ハドロン質量の起源 / カイラル対称性 / ω中間子 / J-PARC / 中性子検出器 / γ線検出器 / 原子核実験

Research Abstract

Hadrons, such as proton or meson, consists of quarks. It is known that hadrons have larger mass than sum of quark mass. In this study, we aim to measure mass distribution of mesons in nucleus precisely to study origin of hadron mass experimentally. We will perform an exclusive measurement using omega meson and simultaneous detection of production and decay processes. We have succeeded to construct a neutron detector.

Research Products

• [Journal Article] ω meson in nucleus, experimental study (2010)
  • Author(s): 小沢恭一郎
  • Journal Title: Progress of Theoretical Physics Supplement 186 Pages: 325-330
  • NAID: 110008143457
  • Peer Reviewed
• [Journal Article] ω meson in nucleus, experimental study (2010)
  • Author(s): 小沢恭一郎
  • Journal Title: Progress of Theoretical Physics Supplement Volume: 186 Pages: 325-330
  • NAID: 110008143457
  • Peer Reviewed
• [Presentation] 核内ω中間子質量分布測定のための検出器開発 (2011)
  • Author(s): 桝本新一, 小沢恭一郎
  • Organizer: 日本物理学会第66回年次大会
  • Place of Presentation: 新潟大学
  • Year and Date: 2011-03-28
• [Presentation] 核内ω中間子質量分布測定のための検出器開発 (2011)
  • Author(s): 桝本新一
  • Organizer: 物理学会 年会
  • Place of Presentation: 新潟大学
  • Year and Date: 2011-03-28
• [Presentation] ハドロン将来計画 (2011)
  • Author(s): 小沢恭一郎
  • Organizer: 第4回機構シンポジウム
  • Place of Presentation: KEK
  • Year and Date: 2011-02-28
• [Presentation] Experimental Activities at University of Tokyo (2010)
  • Author(s): 小沢恭一郎
  • Organizer: International Symposium on Nuclear Physics in Asia
  • Place of Presentation: 中国北京
  • Year and Date: 2010-10-15
• [Presentation] J-PARC E06実験及びP26実験に向けたCsI(Tl)カロリメータ用新光読出し方式 (2010)
  • Author(s): 桝本新一, 小沢恭一郎
  • Organizer: 日本物理学会秋季大会
  • Place of Presentation: 九州工業大学
  • Year and Date: 2010-09-11
• [Presentation] J-PARC E06実験及びP26実験に向けたCsI(T1)カロリメータ用新光読出し方式 (2010)
  • Author(s): 桝本新一
  • Organizer: 物理学会 秋の分科会
  • Place of Presentation: 九州工業大学
  • Year and Date: 2010-09-11
• [Presentation] 核内ω中間子複合測定のための検出器系設計と開発 (2010)
  • Author(s): 宇都宮和樹
  • Organizer: 日本物理学会第65回年次大会
  • Place of Presentation: 岡山大学
  • Year and Date: 2010-03-23
• [Presentation] 核内ω中間子質量分布測定のための検出器開発の現状 (2010)
  • Author(s): 桝本新一
  • Organizer: 日本物理学会第65回年次大会
  • Place of Presentation: 岡山大学
  • Year and Date: 2010-03-23
• [Presentation] omega meson in nucleus, experimental study (2010)
  • Author(s): K.Ozawa
  • Organizer: New Frontiers in QCD synposium
  • Place of Presentation: YITP, Kyoto,Japan.
  • Year and Date: 2010-02-22
• [Presentation] omega meson in nucleus, experimental study (2010)
  • Author(s): 小沢恭一郎
  • Organizer: New Frontiers in QCD synposium
  • Place of Presentation: 京都大学基礎物理学研究所
  • Year and Date: 2010-02-22
• [Presentation] Experimental Activities at University of Tokyo (2010)
  • Author(s): K.Ozawa
  • Organizer: Internal Symposium on Nuclear Physics in Asia
  • Place of Presentation: Convention Center of Beihang University, Beijing, China
• [Presentation] 核内ω中間子複合測定のための検出器系設計と開発 (2010)
  • Author(s): 宇都宮和樹, 桝本新一, 小沢恭一郎
  • Organizer: 日本物理学会第65回年次大会
  • Place of Presentation: 岡山
• [Presentation] 核内ω中間子質量分布測定のための検出器開発の現状 (2010)
  • Author(s): 桝本新一, 宇都宮和樹, 小沢恭一郎
  • Organizer: 日本物理学会第65回年次大会
  • Place of Presentation: 岡山
• [Presentation] New detector design for combined measurements of omega meson (2009)
  • Author(s): 宇都宮和樹
  • Organizer: 第3回日米物理学会合同核物理分科会(HAW09)
  • Place of Presentation: ハワイ、米国
  • Year and Date: 2009-10-13
• [Presentation] Experimental study of ω meson in nucleus (2009)
  • Author(s): 小沢恭一郎
  • Organizer: US-Japan Joint Workshop on Meson Production Reactions at Jeffers
  • Place of Presentation: ハワイ、米国
  • Year and Date: 2009-10-12
• [Presentation] Direct measurments of ω mass modification in A (π, nω) X reaction and ω→ π^0 γ decays (2009)
  • Author(s): K.Ozawa
  • Organizer: Physics and Upgrade of the J-PARC hadron Facility
  • Place of Presentation: J-PARC, Ibaraki, Japan.
  • Year and Date: 2009-09-18
• [Presentation] Direct measurments of ω mass modification in A(π, nω)X reaction and ω→π^0γd (2009)
  • Author(s): 小沢恭一郎
  • Organizer: Physics and Upgrade of the J-PARC hadron Facility
  • Place of Presentation: 茨城量子ビーム研究センタ
  • Year and Date: 2009-09-18
• [Presentation] ω中間子原子核束縛状態探索のためのTOF中性子検出器の開発 (2009)
  • Author(s): 宇都宮和樹
  • Organizer: 中間子原子核束縛状態探索のためのTOF中性子検出器の開発
  • Place of Presentation: 立教大学
  • Year and Date: 2009-03-30
• [Presentation] New detector design for combined measurements of omega meson (2009)
  • Author(s): K.Utsunomiya, K.Ozawa
  • Organizer: HAW09
  • Place of Presentation: Waikoloa, Hawaii
• [Presentation] Experimental study of ω meson in nucleus (2009)
  • Author(s): K.Ozawa
  • Organizer: US-Japan Joint Workshop on Meson Production Reactions at Jefferson Lab and J-PARC
  • Place of Presentation: Waikoloa, Hawaii
• [Presentation] Mass modifications of vector mesons at normal density (2009)
  • Author(s): K.Ozawa
  • Organizer: NUCLEAR MEDIUM EFFECTS ON THE QUARK AND GLUON, ECT*
  • Place of Presentation: Villazzano, Italy
• [Presentation] ω中間子原子核束縛状態探索のためのTOF中性子検出器の開発 (2009)
  • Author(s): 宇都宮和樹, 青木和也, 井澗勇気, 小沢恭一郎, 郡司卓, 小松雄哉, 四日市悟, 渡辺陽介
  • Organizer: 日本物理学会第64回年次大会
  • Place of Presentation: 立教大学
• [Presentation] Experimental study of hadron mass in QCD medium (2008)
  • Author(s): K.Ozawa
  • Organizer: Tokyo-Yonsei Workshop
  • Place of Presentation: Yonsei University, Korea
  • Year and Date: 2008-10-30
• [Presentation] Experimental study of hadron mass in QCD medium (2008)
  • Author(s): 小沢恭一郎
  • Organizer: Tokyo-Yonsei Workshop
  • Place of Presentation: Yonsei University, Kore
  • Year and Date: 2008-10-30
• [Presentation] Chiral Properties in Nuclear Medium ～Origin of mass (2008)
  • Author(s): 小沢恭一郎
  • Organizer: ASIA Science seminar on Frontier Science at High-Intensity Proton A
  • Place of Presentation: 北京大学,中国
  • Year and Date: 2008-10-23
• [Presentation] Dense Matter at J-PARC (2008)
  • Author(s): 小沢恭一郎
  • Organizer: 2nd Asian Triangle Heavy Ion Conference (ATHIC 2008)
  • Place of Presentation: 筑波大学
  • Year and Date: 2008-10-15
• [Presentation] Mass modifications of vector mesons at normal density (2008)
  • Author(s): 小沢恭一郎
  • Organizer: Mass modifications of vector mesons at normal density
  • Place of Presentation: ECT^*, Villazzano, Italy
  • Year and Date: 2008-06-07
• [Presentation] Chiral Properties in Nuclear Medium-Origin of mass (2008)
  • Author(s): K.Ozawa
  • Organizer: ASIA Science seminar on Frontier Science at High-Intensity Proton Accelerators
  • Place of Presentation: Beijing University, China
• [Presentation] Dense Matter at J-PARC (2008)
  • Author(s): K.Ozawa
  • Organizer: 2nd Asian Triangle Heavy Ion Conference (ATHIC 2008)
  • Place of Presentation: University of Tsukuba, Japan
• [Presentation] 加速器で探る核媒質中のハドロン (2008)
  • Author(s): 小沢恭一郎
  • Organizer: 基研研究会「熱場の量子論とその応用」
  • Place of Presentation: 京都大学基礎物理学研究所
• [Remarks] ホームページ:
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• [Remarks]
  • URL: http://nucl.phys.s.u-tokyo.ac.jp/ozawa_g
• [Remarks]
  • URL: http://nucl.phys.s.u-tokyo.ac.jp/ozawa_g/
• [Remarks]
  • URL: http://nucl.phys.s.u-tokyo.ac.jp/ozawa_g/