2015 Fiscal Year Final Research Report
Quark fragmentation functions
| Project/Area Number |
25400270
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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 | Tokai University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
YAZAKI Koichi 国立研究開発法人理化学研究所, 仁科加速器研究センター, 研究員 (60012382)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Keywords | クォーク / ハドロン / 破砕関数 / 形状因子 / 応答関数 |
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| Outline of Final Research Achievements |
We calculated the quark fragmentation functions, which describe the hadronn production in deep inelastic scattering of leptons on hadron targets.We included the dependence on the spin and transverse momentum of the fragmenting quark to describe multi-fragmentation processes. In our theoretical framework, the 3-dimensional momentum sum rules and the isospin sum rules are satisfied automatically. We pointed out that the spin independent and the spin dependent (so called Collins) fragmentation functions are coupled with each other. We also calculated the fragmentation functions for a quark to two hadrons (dihadron fragmentation functions), and found that the intermediate vector mesons give important contributions. By using our numerical analyses, we made theoretical predictions for the dihadron fragmentation functions.
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| Free Research Field |
原子核・ハドロン物理学
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