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arXiv 1306.2532hep-lathep-ph
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格点量子色动力学中Adler函数的一种新表示

A new representation of the Adler function for lattice QCD

Anthony Francis, Benjamin Jaeger, Harvey B. Meyer, Hartmut Wittig

摘要:

我们讨论了格点量子色动力学计算强子真空极化和相应的Adler函数的几个方面。我们实现了一个表示先前得出的,它允许一个访问这些现象学上的重要功能的一组连续的虚拟,无论当前的风味结构。其次,我们提出了一个理论分析的有限尺寸的影响,我们的特定表示的阿德勒函数,算子乘积展开在大动量和小动量的欧几里得相关的频谱表示的基础上。最后,风味结构的电磁电流相关器进行分析,其中最近的理论估计的威克断开图的贡献是独立重新推导和确认。

英文摘要:

We address several aspects of lattice QCD calculations of the hadronic vacuum polarization and the associated Adler function. We implement a representation derived previously which allows one to access these phenomenologically important functions for a continuous set of virtualities, irrespective of the flavor structure of the current. Secondly we present a theoretical analysis of the finite-size effects on our particular representation of the Adler function, based on the operator product expansion at large momenta and on the spectral representation of the Euclidean correlator at small momenta. Finally, an analysis of the flavor structure of the electromagnetic current correlator is performed, where a recent theoretical estimate of the Wick-disconnected diagram contributions is rederived independently and confirmed.

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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