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arXiv 1301.4622hep-lathep-phnucl-th
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强子极化率的格点量子色动力学方法

Lattice QCD Methods for Hadronic Polarizabilities

B. C. Tiburzi

摘要:

手征动力学对手征极限附近强子的电磁极化率做出了明确的预测;但是,在某些情况下,与实验的一致性是脆弱的。本文综述了计算强子电磁极化率的格点量子色动力学方法。这些方法的核心是均匀经典电磁场中夸克的晶格模拟。一个长期的目标是直接从晶格计算确定极化率,然而,在短期内,人们可能需要依赖于部分猝灭的手征微扰理论。尽管如此,我们仍然可以从手征动力学中得到同样惊人的关于π介子质量与电、磁极化率相关性的预言,并且可以用格点量子色动力学进行检验。一个特别的焦点是一个新的新方法来处理带电粒子关联函数在磁场。

英文摘要:

Chiral dynamics makes definitive predictions for the electromagnetic polarizabilities of hadrons near the chiral limit; but, agreement with experiment is tenuous in some cases. We provide an overview of lattice QCD methods to compute the electric and magnetic polarizabilities of hadrons. Central to these methods is the lattice simulation of quarks in uniform, classical electromagnetic fields. A long-term goal is the determination of polarizabilities directly from lattice computations, however, in the near term, one may need to rely on partially quenched chiral perturbation theory. Nonetheless the same striking predictions for the pion mass dependence of electric and magnetic polarizabilities can be made from chiral dynamics, and tested with lattice QCD. A particular focus is a novel new method to handle charged particle correlation functions in magnetic fields.

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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