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arXiv 0810.3624hep-ph
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格点量子色动力学中的重轻介子物理

Heavy-light meson's physics in Lattice QCD

N. Tantalo

备注：
talk at 34th International Conference on High Energy Physics, Philadelphia, USA, 2008. 4 pages, 2 figures
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摘要：

通过研究标准模型的味区来揭示新物理的可能性，很大程度上取决于（不久）将来格点量子色动力学计算的精度，特别是重-轻介子的可观测量。反过来，处理晶格上的重-轻介子是一个具有挑战性的问题，因为存在两个很大程度上分离的能量标度，目前不可能在不采用某种近似的情况下提取涉及B介子的外态矩阵元素。在这份说明中，我给一个快速的概述已经设计来处理这样的问题，强调那些基于有限体积技术的方法，并简要讨论了最近的一些结果，通过他们的应用。

英文摘要：

The possibility of revealing new physics by studying the flavor sector of the Standard Model strongly depends upon the accuracy that will be achieved in (near) future lattice QCD calculations and, in particular, on heavy-light meson's observables. In turn, handling with heavy-light mesons on the lattice is a challenging problem, because of the presence of two largely separated energy scales, and at present it is impossible to extract matrix elements involving B mesons in external states without recurring to some approximation. In this note I give a fast overview of some of the methods that have been devised to handle such kind of problems, emphasizing those based on finite volume techniques, and briefly discuss some recent results obtained by their application.

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