QCD分解中两个环上的非轻子b衰变

Proceedings of 14th International Symposium on Radiative Corrections — PoS(RADCOR2019) Pub Date : 2019-12-18 DOI:10.22323/1.375.0032

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

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引用次数: 5

摘要

本文报道了在QCD分解框架下计算非轻子B衰变的双环企鹅振幅。我们讨论了这一真正的双环、双尺度问题的计算，并提供了从QCD到SCET的匹配、主积分的计算以及硬散射核和光锥分布振幅的卷积等细节。给出了双环校正尺寸的初步结果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Non-leptonic B-decays at two loops in QCD Factorization

We report on the calculation of the two-loop penguin amplitudes in non-leptonic B decays in the framework of QCD factorization. We discuss the computation of this genuine two-loop, two-scale problem and provide details on the matching from QCD onto SCET, the evaluation of the master integrals, and the convolution of the hard scattering kernels with the light-cone distribution amplitude of the light meson. Preliminary results on the size of the two-loop correction are given.

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Proceedings of 14th International Symposium on Radiative Corrections — PoS(RADCOR2019)

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