Detailed study of QCD through high statistics measurement of hadron production cross section in tagged two-photon collisions
Project/Area Number |
22340062
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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Research Institution | Kanagawa University |
Principal Investigator |
|
Co-Investigator(Kenkyū-buntansha) |
UEHARA Sadaharu 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, 講師 (70176626)
|
Project Period (FY) |
2010-04-01 – 2015-03-31
|
Project Status |
Completed (Fiscal Year 2014)
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Budget Amount *help |
¥18,720,000 (Direct Cost: ¥14,400,000、Indirect Cost: ¥4,320,000)
Fiscal Year 2014: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2013: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2012: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2011: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2010: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
|
Keywords | 量子色力学の検証 / Bファクトリー実験 / 共鳴粒子の構造性質 / 中間子対生成反応 / 低質量スカラー粒子 / 低質量ベクトル粒子 / タグシタ二光子過程 / KEKB-Belle / タグした二光子過程 / 低質量テンソル粒子 / 共鳴粒子の構造と性質 / 素粒子実験 / Bファクトリー / 二光子過程 / タグ光子による物理 / 中間子の構造と性質 / 遷移形状因子 / 仮想光子 / ハドロン生成反応 / π^0中間子の遷移形状因子 |
Outline of Final Research Achievements |
We first measured the transition form factor of the pi0 meson through singly tagged two-photon process and obtained better agreement with the QCD limiting value than the BaBar's, settling the "BaBar anomaly". Then measured the cross section of no-tag-two-photon production of K0S pair from the threshold, confirming the full interference between the f2(1270) and a2(1320) and measuring the two-photon widths of the f2'(1525),etc. At present, the paper on the measurement of pi0 pair production cross section through singly tagged two-photon collision is almost ready to publish, where the transition form factors of the f0(980) and those of the f2(1270) for each of helicity=0,1 and 2 states as a function of Q2 are measured and compared with theories for the first time.
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Report
(6 results)
Research Products
(21 results)
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[Journal Article] The Physics of the B Factories2014
Author(s)
1.J. Bevan, S. Uehara (79番目), Y. Watanabe (162番目) et al.
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Journal Title
Euro. Phys. J.
Volume: C 74
Issue: 11
Pages: 3026-3026
DOI
Related Report
Peer Reviewed / Open Access / Acknowledgement Compliant
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