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arXiv 1210.2137nucl-ex
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Belle的碎片函数

Fragmentation Functions at Belle

Martin Leitgab

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4 pages, 6 figures; submitted to Proceedings of Deep-Inelastic Scattering Conference DIS2012 in Bonn, Germany
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摘要：

碎裂函数（FF）描述了从部分子初始态到最终态粒子的形成。这些功能的精确知识是一个关键因素，在访问量，如核子自旋结构在半包容性的深度非弹性散射和质子质子碰撞。然而，碎裂函数目前不能从第一原理量子色动力学确定，必须从实验数据中提取。日本KEK的Belle实验为高精度测量e^{+}e^{-}湮灭提供了大量数据样本，从而首次或更精确地提取碎裂函数。分析提取的自旋无关（非极化FF），以及自旋相关的碎裂功能（干扰FF）在贝尔。

英文摘要：

Fragmentation functions (FFs) describe the formation of final state particles from a partonic initial state. Precise knowledge of these functions is a key ingredient in accessing quantities such as the nucleon spin structure in semi-inclusive deep-inelastic scattering and proton proton collisions. However, fragmentation functions can currently not be determined from first principles Quantum Chromodynamics and have to be extracted from experimental data. The Belle experiment at KEK, Japan, provides a large data sample for high precision measurements on e^{+}e^{-} annihilations allowing for first-time or more precise extractions of fragmentation functions. Analyses for extractions of spin-independent (unpolarized FFs) as well as spin-dependent fragmentation functions (interference FFs) at Belle are presented.

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