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arXiv 0804.1750hep-ph
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关于重介子衰变宽度中dB =0算符的矩阵元

On the matrix elements of dB=0 operators in the heavy meson decay widths

Damir Becirevic, Svjetlana Fajfer, Jernej F. Kamenik

摘要:

我们确定了与研究重轻介子寿命比以及包含重轻衰变的幂修正有关的Delta B=0四夸克算符的矩阵元的手征修正。本文计算的手征对数修正可以与晶格上相应矩阵元的估计相结合,给出著名的袋参数B_(1,2)和B_(1,2)的可靠物理结果。

英文摘要:

We determine the chiral corrections to the matrix elements of the Delta B=0 four-quark operators which are relevant to the studies of the ratios of lifetimes of heavy-light mesons as well as to the power corrections to the inclusive semileptonic heavy-to-light decays. The chiral logarithmic corrections computed here can be combined with the forthcoming estimates of the corresponding matrix elements on the lattice to provide the reliable physics result of the well known bag-parameters B_(1,2) and epsilon_(1,2).

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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