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arXiv 0810.1230hep-ph
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微分半轻子b --> u衰变在形函数区的双圈QCD修正

Two-loop QCD correction to differential semi-leptonic b --> u decays in the shape-function region

M. Beneke, T. Huber, Xin-Qiang Li

摘要:

我们计算了壳层上b夸克衰变为高能无质量夸克的形状因子的双圈QCD修正,这是在形状函数区域内从包含的半轻子\bar B --> X_ul nu衰变中确定|V_ub|的O(α_s^2)所需的最后一个修正.

英文摘要:

We calculate the two-loop QCD correction to the form factors of on-shell b-quark decay to an energetic massless quark, which constitutes the last missing piece required for an O(alpha_s^2) determination of |V_ub| from inclusive semi-leptonic \bar B --> X_u l nu decays in the shape-function region.

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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