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arXiv 0810.3315hep-ph
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在FAPT中保持平衡:Euclid vs Minkowski

Thresholds in FAPT: Euclid vs Minkowski

Alexander P. Bakulev

摘要:

本文简要介绍了QCD中的解析微扰理论(APT),描述了它所面临的问题,并提出了分数阶APT(FAPT)作为解决这些问题的工具。我们还简要介绍了如何处理FAPT中的重夸克阈值。作为这种方法的应用,我们讨论了(i)在欧几里得FAPT中π介子形状因子的计算和(ii)在闵可夫斯基FAPT中希格斯玻色子衰变$H^0\to b\bar{b}$的计算。我们的结论与比较这两种方法,欧几里得和闵可夫斯基FAPT。

英文摘要:

We give a short introduction to the Analytic Perturbation Theory (APT) in QCD, describe its problems and suggest as a tool for their resolution the Fractional APT (FAPT). We also describe shortly how to treat heavy-quark thresholds in FAPT. As an applications of this technique we discuss (i) the pion form factor calculation in the Euclidean FAPT and (ii) the Higgs boson decay $H^0\to b\bar{b}$ in Minkowskian FAPT. We conclude with comparison of both approaches, Euclidean and Minkowskian FAPT.

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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