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arXiv 0910.5271hep-ph
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手征夸克孤子模型与核子自旋结构函数

Chiral Quark Soliton Model and Nucleon Spin Structure Functions

M. Wakamatsu

摘要:

手征夸克孤子模型(CQSM)是目前在夸克水平上研究重子最成功的模型之一,它最大限度地体现了低能QCD的最重要特征,即手征对称性及其自发破缺。基本上,它是一个相对论性平均场论,充分考虑了在刺猬形旋转对称破缺平均场中的无穷多个Dirac-海夸克。迄今为止建立的数值方法使我们能够对Casimir效应(即真空极化Dirac海的效应)对各种重子观测量的影响进行非微扰估计。模型的这种不相容特征在它对核子的部分子分布函数的预测中表现得最为明显。在这次演讲中,在简要回顾了CQSM的几个基本特征后,我们计划以各种方式证明这种独特的重子模型为我们提供了一个理想的工具,用于解开核子内部部分子结构的非微扰方面,特别是核子的潜在自旋结构函数。

英文摘要:

The chiral quark soliton model (CQSM) is one of the most successful models of baryons at quark level, which maximally incorporates the most important feature of low energy QCD, i.e. the chiral symmetry and its spontaneous breakdown. Basically, it is a relativistic mean-field theory with full account of infinitely many Dirac-sea quarks in a rotational-symmetry-breaking mean field of hedgehog shape. The numerical technique established so far enables us to make a nonperturbative evaluation of Casimir effects (i.e. effects of vacuum-polarized Dirac sea) on a variety of baryon observables. This incompatible feature of the model manifests most clearly in its predictions for parton distribution functions of the nucleon. In this talk, after briefly reviewing several basic features of the CQSM, we plan to demonstrate in various ways that this unique model of baryons provides us with an ideal tool for disentangling nonperturbative aspect of the internal partonic structure of the nucleon, especially the underlying spin structure function of the nucleon.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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