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arXiv 1012.5207hep-phhep-lat
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QCD中的π形状因子:如何计算?

Pion Form Factor in QCD: How to Calculate?

Alexander P. Bakulev

摘要:

本文讨论了QCD中π形状因子的计算,简要地讨论了非定域凝聚QCD求和规则方法的要点,并给出了它对π形状因子的计算结果,即$F_π(Q^2)$。这些结果与微扰和格点量子色动力学的预言进行了比较。然后我们考虑了QCD中π介子FF的局域对偶(LD)方法,并证明了对于$Q^2\gtrsim 2$ GeV $^2$,该方法的主要参数,即$s_0^{\text{LD}}(Q^2)$,应该随$Q^2$而增长,而不是一个常数.

英文摘要:

We discuss the pion form factor calculation in QCD.We shortly consider the main points of the nonlocal condensate QCD sum rule approach and show its results for the pion form factor, $F_π(Q^2)$. These results are compared with predictions of the perturbative and lattice QCD. Then we consider the Local Duality (LD) approach for the pion FF in QCD and show that for $Q^2\gtrsim 2$ GeV$^2$ the main parameter of the approach, namely, $s_0^{\text{LD}}(Q^2)$ should grow with $Q^2$ rather than be a constant.

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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