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arXiv 2008.03935hep-phhep-ex
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由QCD求和规则计算$B_s$介子分布振幅的逆矩

Inverse moment of the $B_s$-meson distribution amplitude from QCD sum rule

Alexander Khodjamirian, Rusa Mandal, Thomas Mannel

摘要:

我们导出了HQET中$B_s$介子光锥分布振幅的倒数矩的QCD求和定则。在这种方法中,$SU(3)_{fl}$对称性破坏被追溯到奇异夸克质量和奇异夸克凝聚密度与非奇异夸克凝聚密度之间的差异。我们预测的比值的逆矩$λ_{B_s}/λ_B= 1.19 \pm 0.14$,可用于各种应用程序的这些分布振幅的分析$B_{s}$介子衰变,提供了一个准确的值$λ_B$是可从其他来源,如$B\to \ell ν_\ell γ$衰变。

英文摘要:

We derive a QCD sum rule for the inverse moment of the $B_s$-meson light-cone distribution amplitude in HQET. Within this method, the $SU(3)_{fl}$ symmetry violation is traced to the strange quark mass and to the difference between strange and nonstrange quark condensate densities. We predict the ratio of inverse moments $λ_{B_s}/λ_B= 1.19 \pm 0.14$ which can be used in various applications of these distribution amplitudes to the analyses of $B_{s}$-meson decays, provided an accurate value of $λ_B$ is available from other sources, such as the $B\to \ell ν_\ell γ$ decay.

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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