2009 Fiscal Year Final Research Report
Study of meson properties and structures through high-statistics measurement of cross sections in two-photon production
| Project/Area Number |
19340056
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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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 | Kanagawa University |
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Principal Investigator |
WATANABE Yasushi Kanagawa University, 工学部, 教授 (40126199)
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| Co-Investigator(Kenkyū-buntansha) |
UEHATA Sadaharu 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)
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| Research Collaborator |
MIKE Pennington Durham University, Department of Physics, Professor
NAKAZAWA Hideyuki National Central University, Dept.of Physics, Taiwan, Research associate
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| Project Period (FY) |
2007 – 2009
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| Keywords | 二光子過程 / スカラー中間子の性質と構造 / 量子色力学 / Bファクトリー実験 / 強い相互作用の真空 / 高統計の断面積のデータ / 中間子対生成反応 / 共鳴粒子 |
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| Research Abstract |
We have measured and analyzed differential cross sections of two-photon production of meson pairs : γγ→π^+π^-,π^0π^0,π^0η and ηη at B-factory experiment, Belle. These data are of two to three orders of magnitude higher statistics than previous experiments and of only ones presently available with this level of statistics in the world. These data would shed light to properties and structures of hitherto mysterious low mass scalar mesons in the low energy region. Furthermore, they provide direct mean to check predictions on exclusive processes from QCD (Quantum Chromodynamics, theory of strong interaction) in the high energy region.
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