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arXiv 0803.3013hep-ph
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在(F)APT中恢复

Resummation in (F)APT

A. P. Bakulev, S. V. Mikhailov

摘要:

在单圈近似下,给出了QCD解析微扰论(APT)中非幂级数展开求和的新结果。我们展示了如何推广的方法,我们之一建议较早的情况下,APT和分数APT(FAPT)与重夸克阈值。使用这种方法,我们分析了希格斯玻色子衰变$H^0\to\bar{b}b$。我们产生的高阶校正的重要性(F)APT的估计,并提出了一个非常透明的解释remmation结果的$Λ_\text{QCD}$移位。

英文摘要:

We present new results on the summation of nonpower-series expansions in QCD Analytic Perturbation Theory (APT) in the one-loop approximation. We show how to generalize the approach suggested by one of us earlier to the cases of APT and Fractional APT (FAPT) with heavy-quark thresholds. Using this approach we analyze the Higgs boson decay $H^0\to\bar{b}b$. We produce estimations of the higher-order corrections importance in (F)APT and present a very transparent interpretation of the resummation results in terms of $Λ_\text{QCD}$ shifts.

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