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arXiv 1303.0958hep-phhep-ex
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B-> Xs γ衰变率的模型无关测定

A model independent determination of the B -> Xs gamma decay rate

Florian U. Bernlochner, Heiko Lacker, Zoltan Ligeti, Iain W. Stewart, Frank J. Tackmann, Kerstin Tackmann

摘要:

SIMBA合作的目标是提供一个全球性的适合的包容B-> X_s γ和B-> X_u l nu衰变的可用测量。通过进行整体拟合,可以同时确定相关的归一化,即总的B → X_s γ率和CKM矩阵元|Vub|,以及所需的强子参数,最重要的是B介子中的b夸克质量和b夸克分布函数,称为形状函数。在这次演讲中,目前的地位,在模型无关的确定形状函数和|C7 ^\incl Vtb Vts *|,它参数化总的B-> Xs伽马率,从一个全球性的拟合到现有的B-> X_s伽马测量从Babar和Belle。特别是,理论上的不确定性源于不同的分解尺度的变化进行了评估。

英文摘要:

The goal of the SIMBA collaboration is to provide a global fit to the available measurements of inclusive B -> X_s gamma and B -> X_u l nu decays. By performing a global fit one is able to simultaneously determine the relevant normalizations, i.e. the total B -> X_s gamma rate and the CKM-matrix element |Vub|, together with the required hadronic parameters, most importantly the b-quark mass and the b-quark distribution function in the B-meson, called the shape function. In this talk, the current status on the model-independent determination of the shape function and |C7^\incl Vtb Vts*|, which parametrizes the total B -> Xs gamma rate, from a global fit to the available B -> X_s gamma measurements from Babar and Belle is presented. In particular, the theoretical uncertainties originating from variations of the different factorization scales are evaluated.

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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