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arXiv 1004.2202hep-th
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关于Feynman图的求和

On the Summation of Feynman Graphs

H. M. Fried, Y. Gabellini

摘要:

本文提出了一种求与特定场论过程有关的所有费曼图的和的泛函方法,并将其应用于QED,证明了在复杂性不断增加的近似下,修饰光子传播子的规范不变量计算是明显的。这些导致在一个自然的方式提取领先的对数发散的每一个微扰的顺序,并证明可能取消所有这些发散的计算(逆)光子的波函数重整化常数Z3。这个分析提供了一个定性的理解,为什么重正化精细结构常数的测量值是,大约,1/137。

英文摘要:

A functional method to achieve the summation of all Feynman graphs relevant to a particular Field Theory process is suggested, and applied to QED, demonstrating manifestly gauge invariant calculations of the dressed photon propagator in approximations of increas- ing complexity. These lead in a natural way to the extraction of the leading logarithmic divergences of every perturbative order, and to a demonstration of the possible cancellation of all such divergences in the calculation of the (inverse of the) photon's wavefunction renormalization constant Z3. This analysis provides a qualitative understanding of why the measured value of the renormalized fine structure constant is, approximately, 1/137.

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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