Perturbative QCD and New Development of Spin Physics
微扰QCD与自旋物理新进展
基本信息
- 批准号:12640266
- 负责人:
- 金额:$ 1.73万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (C)
- 财政年份:2000
- 资助国家:日本
- 起止时间:2000 至 2002
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
In the present research project, we have investigated the high-energy spin physics aiming at its new development, based on the framework of the perturbative QCD, utilizing the Operator Product Expansion (OPE) together with the renormalization group as well as the parton picture described by the DGLAP type evolution equation. In the first year, we have studied the spin structure function g_1 of the photon measured by the polarized electron-positron collision and the spin-dependent parton distributions of the quark and gluon inside the polarized virtual photon, to the next-to-leading-log order of QCD. In this respect, we have shows that the parton distributions depend on the factorization scheme as well as the characteristic features of each scheme based on the actual perturbative calculation, in the higher-order of the perturbation theory. On the other hand, in the second and the third (last) years of this research project, we clarified the higher-twist effects, especially that there ap … More pears the twist-3 effect is the g_2 structure function of the polarized virtual photon. We have shows this first by the QED Box diagram calculation and then the OPE analysis for the case of pure QED interaction. We further extruded this result to the case including the QCD interaction, in particular, the exact third moment of g_2 structure function to the leading-log order as well as the large N_c limit of the x dependence of the flavor-nonsinglet part. We also investigated the positivity constraint on the eight structure functions of the virtual photon and intiated the target mass effects of virtual photon target in the framework of O(4) expansion and Nachtmann moments. In the course of the present research, discussions and communications with the people in the related fields were very useful. Especially, we are very much indebted to the communications with the researchers at University of Tokyo, Hiroshima University, Yokohama National University, RIKEN and DESY. We have published our results at JPS meeting and the international workshops at the domestic as well as foreign research Institutes. These results have been published in the journals listed above. Less
在本研究项目中,我们基于微扰QCD的框架,利用算子积展开(OPE)和重整化群以及DGLAP型演化方程描述的部分图,针对高能自旋物理学的新发展进行了研究。在第一年,我们研究了偏振电子-正电子碰撞测量的光子的自旋结构函数g_1,以及偏振虚光子内部夸克和胶子的自旋相关的部分子分布,达到QCD的次领先对数阶。在这方面,我们已经证明了部分子分布依赖于基于实际微扰计算的分解方案以及每个方案的特征特征,在微扰理论的高阶。另一方面,在本课题的第二年和第三年(最后一年),我们澄清了高扭效应,特别是有更多的证据表明,扭转-3效应是偏振虚光子的g_2结构函数。我们首先通过QED框图计算,然后通过纯QED相互作用的OPE分析来证明这一点。我们进一步将这一结果推广到包含QCD相互作用的情况,特别是g_2结构函数的精确三阶矩为导对数阶,以及风味非单重态部分的x依赖性的大N_c极限。我们还研究了虚光子8个结构函数的正性约束,并在O(4)展开和Nachtmann矩的框架下启动了虚光子目标的目标质量效应。在目前的研究过程中,与相关领域人士的讨论和交流是非常有益的。特别是,我们非常感谢与东京大学,广岛大学,横滨国立大学,理研和DESY的研究人员的交流。我们的研究成果已在JPS会议和国内外研究机构的国际研讨会上发表。这些结果已经发表在上面列出的期刊上。少
项目成果
期刊论文数量(40)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
K.Sasaki: "Virtual photon structure functions and positivity constraints"Phys. Rev. D. 66. 034014 (2002)
K.Sasaki:“虚拟光子结构函数和正性约束”Phys。
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- 影响因子:0
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- 通讯作者:
K. Sasaki, T. Uematsu: "Parton distribution in the virtual photon target and factorization scheme dependence"Nucl. Phys. B. (Proc. Suppl. ). 89. 162-167 (2000)
K. Sasaki、T. Uematsu:“虚拟光子目标中的帕子分布和分解方案依赖性”Nucl。
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- 影响因子:0
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- 通讯作者:
H. Baba, K. Sasaki, T. Uematsu: "Twist-3 effects in polarized photon structure"arXiv: hep-ph/0205086 To appear Int. J. Mod. Phys. A..
H. Baba、K. Sasaki、T. Uematsu:“偏振光子结构中的 Twist-3 效应”arXiv:hep-ph/0205086 出现 Int。
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- 发表时间:
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- 影响因子:0
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- 通讯作者:
H.Baba: "Polarized photon structure : g_1^γ and g_2^γ"Czech Journal of Physics. 52. C147-C154 (2002)
H.Baba:“偏振光子结构:g_1^γ 和 g_2^γ”捷克物理学杂志 52。C147-C154 (2002)
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- 发表时间:
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- 影响因子:0
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- 通讯作者:
K.Sasaki: "Polarized and unpolarized structures of the virtual photon."Proceedings of Photon 2000. (掲載予定). (2001)
K.Sasaki:“虚拟光子的偏振和非偏振结构。”Proceedings of Photon 2000。(待出版)。
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UEMATSU Tsuneo其他文献
UEMATSU Tsuneo的其他文献
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{{ truncateString('UEMATSU Tsuneo', 18)}}的其他基金
Physics in the Energy-Frontier and the Perturbative Methodof Quantum Chromodynamics
能量前沿物理学和量子色动力学的微扰方法
- 批准号:
22540276 - 财政年份:2010
- 资助金额:
$ 1.73万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Higher Order Effects in QCD and the New Development of Calculational Method
QCD的高阶效应及计算方法的新发展
- 批准号:
18540267 - 财政年份:2006
- 资助金额:
$ 1.73万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Structure of Deep Inelastic Interaction in Gauge and String Theories
规范和弦理论中的深层非弹性相互作用的结构
- 批准号:
15540266 - 财政年份:2003
- 资助金额:
$ 1.73万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Extended Supersymmetry and Dynamics of Integrable System
扩展超对称性和可积系统动力学
- 批准号:
10209208 - 财政年份:1998
- 资助金额:
$ 1.73万 - 项目类别:
Grant-in-Aid for Scientific Research on Priority Areas (B)
High-energy QCD and Supersymmetric Integrable Models
高能 QCD 和超对称可积模型
- 批准号:
09640345 - 财政年份:1997
- 资助金额:
$ 1.73万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Supersymmetric Integrable Theory and String Moedl
超对称可积理论与弦模型
- 批准号:
06640392 - 财政年份:1994
- 资助金额:
$ 1.73万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Conformal Supergravity and String Model
共形超重力和弦模型
- 批准号:
63540216 - 财政年份:1988
- 资助金额:
$ 1.73万 - 项目类别:
Grant-in-Aid for General Scientific Research (C)