2014 Fiscal Year Final Research Report
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 |
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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)
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Project Period (FY) |
2010-04-01 – 2015-03-31
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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 |
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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Free Research Field |
素粒子実験
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