| Project/Area Number |
23540292
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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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 | Niigata University |
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Principal Investigator |
KOIKE Yuji 新潟大学, 自然科学系, 教授 (60262458)
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| Co-Investigator(Kenkyū-buntansha) |
TANAKA Kazuhiro 順天堂大学, 医学部, 准教授 (70263671)
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| Co-Investigator(Renkei-kenkyūsha) |
SAITO Naohito 高エネルギー加速器研究機構, 素粒子原子核研究所, 教授 (20321763)
GOTO Yuji 理化学研究所, 延與放射線研究室, 先任研究員 (00360545)
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| Project Period (FY) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2012: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2011: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | ハドロン物理学 / 量子色力学 / 核子構造 / 摂動ＱＣＤ / シングルスピン非対称 / 高エネルギー過程 / RHIC / 高次ツイスト / 核子核子衝突 / セミインクルーシブ深非弾性散乱 / ３グルーオン相関 / クォーク・グルーオン相関 |
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| Research Abstract |
Based on perturbative QCD, we have studied the single spin asymmetries (SSA) caused by multi-parton correlations (higher twist effect), and obtained the following results: (1) The quark-gluon correlation functions in the nucleon can describe the main features of the SSAs observed in the nucleon-nucleon collion at RHIC. (2) We have derived the formulas for the contribution of the multigluon correlations in the nucleon to SSAs in semi-inclusive deep inelastic scattering and the nucleon-nucleon scatterings, and clarified the characteristic features of its contribution. (3) We have established the formalism to calculate the contribution of the twist-3 fragmentation function to SSAs. We have also shown a possibility that the combination of the twist-3 fragmentation function and the quark-gluon correlation function in the mnucleon can consistently describe the SSAs in semi-inclusive deep inelastic scattering and the nucleon-nucleon collision.
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