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arXiv 0903.0790hep-ph
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三粒子对B介子光锥分布振幅重整化的贡献

Three-particle contributions to the renormalisation of B-meson light-cone distribution amplitudes

S. Descotes-Genon, N. Offen

摘要:

本文研究了B介子等重轻系统的光锥分布振幅。通过显式计算,我们确定了两部分子分布振幅与三部分子分布振幅如何在一个环中混合:π_+只与自身混合,而π_-与三部分子分布振幅之差π_A-π_V混合。我们确定了相应的反常维数,并通过考虑一般协变规范检验了我们结果的规范独立性。最后,我们评论的一些影响,我们的结果,这些分布振幅的唯象模型。

英文摘要:

We study light-cone distribution amplitudes of heavy-light systems, such as a B-meson. By an explicit computation, we determine how two-parton distribution amplitudes mix with three-parton ones at one loop: ϕ_+ is shown to mix only into itself, whereas ϕ_- mixes with the difference of three-parton distribution amplitudes Ψ_A-Ψ_V. We determine the corresponding anomalous dimension and we check the gauge independence of our result by considering a general covariant gauge. Finally, we comment on some implications of our result for phenomenological models of these distribution amplitudes.

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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