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arXiv 2502.20165hep-ph
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SU(3)分析底介子衰变中的不可因子化贡献

SU(3) analysis of nonfactorizable contributions to bottom mesons decays

Maninder Kaur, R. C. Verma

AI总结:

本文将同位旋分析推广至SU(3)味对称性,用约化矩阵元参数化不可因子化贡献,基于测量分支比预测CKM增强与抑制的B到PP衰变分支比,结果与实验吻合。

摘要:

本文是我们先前工作[arXiv:2108.03296](题为《寻找B强子衰变中不可因子化贡献的系统性》)的扩展。为了充分实现同位旋分析的影响,并将奇异底介子的衰变与非奇异底介子的衰变联系起来,我们将其推广到SU(3)味对称性,以研究CKM增强和CKM抑制衰变中的不可因子化贡献。我们首先将总弱衰变振幅表示为因子化部分和不可因子化部分之和,然后利用已知的介子衰变常数和相关的形状因子数值地获得衰变振幅的因子化部分,再将不可因子化部分用SU(3)约化矩阵元表示。利用几个CKM增强模式的测量分支比,我们确定了约化矩阵元,并预测了其余CKM增强衰变以及所有CKM抑制的B到PP衰变过程的分支比。我们发现测量的分支比与我们的结果吻合良好,其他预测值可在未来的实验中得到检验。

英文摘要:

This paper is the extension of our previous work [arXiv:2108.03296] entitled Searching a systematics for nonfactorizable contributions to B hadronic decays. In order to realize the full impact of isospin analysis, and to relate decays of strange bottom meson with those of nonstrange bottom mesons, we generalize it to the SU(3) flavor symmetry to investigate the nonfactorizable contributions to CKM-enhanced and CKM-suppressed decays. We start with expressing total weak decay amplitude as sum of the factorizable and nonfactorizable parts, then obtain the factorizable part of the decay amplitude numerically using the known meson decay constants and relevant form-factors, then express the nonfactorizable parts in terms of SU(3)-reduced matrix elements. Using measured branching fractions of a few CKM-favored modes, we fix the reduced matrix elements, and predict branching ratios of the remaining CKM-favored decays and all CKM-suppressed B to PP decays processes.We find that the measured branching fractions agree well with our results, and other predicted values may be tested in the future experiments.

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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