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arXiv 1702.04571hep-ph
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双Higgs偶态模型中B介子的弱辐射衰变和$M_{H^\pm}$的边界

Weak Radiative Decays of the B Meson and Bounds on $M_{H^\pm}$ in the Two-Higgs-Doublet Model

Mikolaj Misiak, Matthias Steinhauser

摘要:

在最近的出版物[6]中,Belle合作更新了他们对包容性弱辐射B介子衰变的分析,包括(772 +_ 11)x 10^6 BBbar对的完整数据集。他们对分支比的结果现在低于标准模型的预测[7,8],尽管它仍然与标准模型的预测一致。然而,在双希格斯模型中,带电希格斯玻色子质量的界限受到了显著的影响。在所谓的模型II中,95%的C. L. $M_{H^\pm}$的下限现在在570-800 GeV的范围内,这非常敏感地取决于用于确定它的方法。我们现在的说明致力于介绍和讨论更新的界限,以及澄清在评估它们时可能遇到的几个模糊之处。其中一个模糊之处源于光子能量截止的选择,鉴于实验精度的提高,这一点值得重新考虑。

英文摘要:

In a recent publication [6], the Belle collaboration updated their analysis of the inclusive weak radiative B-meson decay, including the full dataset of (772 +_ 11) x 10^6 BBbar pairs. Their result for the branching ratio is now below the Standard Model prediction [7,8], though it remains consistent with it. However, bounds on the charged Higgs boson mass in the Two-Higgs-Doublet Model get affected in a significant manner. In the so-called Model-II, the 95% C.L. lower bound on $M_{H^\pm}$ is now in the 570-800 GeV range, depending quite sensitively on the method applied for its determination. Our present note is devoted to presenting and discussing the updated bounds, as well as to clarifying several ambiguities that one might encounter in evaluating them. One of such ambiguities stems from the photon energy cutoff choice, which deserves re-consideration in view of the improved experimental accuracy.

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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