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arXiv 1003.2132hep-phnucl-th
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重介子衰变跃迁形状因子的光锋模型

Light-Front Model of Transition Form-Factors in Heavy Meson Decay

J. P. B. C. de Melo, T. Frederico

摘要:

重介子衰变的电弱跃迁形状因子是从实验数据中提取Cabibbo-Kobayashi-Maskawa(CKM)矩阵元的重要组成部分。本文在光阵面框架下,计算了$D$介子到π介子或K介子的半轻子衰变的电弱跃迁形状因子。在这两种情况下,模型结果低估了CLEO的新数据,在实验中可获得更大的动量转移。我们讨论了可能的原因,以改善模型。

英文摘要:

Electroweak transition form factors of heavy meson decays are important ingredients in the extraction of the Cabibbo-Kobayashi-Maskawa (CKM) matrix elements from experimental data. In this work, within a light-front framework, we calculate electroweak transition form factor for the semileptonic decay of $D$ mesons into a pion or a kaon. The model results underestimate in both cases the new data of CLEO for the larger momentum transfers accessible in the experiment. We discuss possible reasons for that in order to improve the model.

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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