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arXiv 2009.05779hep-ph
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三重Higgs模型中${\overline B}\to X_s/X_dγ$的CP不对称性

CP asymmetries of ${\overline B}\to X_s/X_dγ$ in models with three Higgs doublets

A. G. Akeroyd, Stefano Moretti, Tetsuo Shindou, Muyuan Song

摘要:

在BELLE II实验中,将探测$1\%$量级的${\overline B}\to X_sγ$和${\overline B}\to X_{s+d}γ$的包容性衰变中的直接CP不对称性(${\cal A}_{CP}$)。在这项工作中,三个这样的不对称性的背景下,一个三希格斯偶极子模型(3HDM)进行了研究,它表明,所有三个${\cal A}_{CP}$可以大到目前的实验极限。特别感兴趣的是用于${\overline B}\to X_{s+d}γ$的${\cal A}_{CP}$,其在标准模型(SM)中被预测为有效地为零。用BELLE II的全部数据测量$2.5\%$或更高的$2.5\%$,将为SM之外的物理提供$5σ$证据。我们在3HDM中显示参数空间,这样的清晰信号是可能的。

英文摘要:

Direct CP asymmetries (${\cal A}_{CP}$) in the inclusive decays of ${\overline B}\to X_sγ$ and ${\overline B}\to X_{s+d}γ$ of the order of $1\%$ will be probed at the BELLE II experiment. In this work, three such asymmetries are studied in the context of a three-Higgs-doublet model (3HDM), and it is shown that all three ${\cal A}_{CP}$ can be as large as the current experimental limits. Of particular interest is ${\cal A}_{CP}$ for ${\overline B}\to X_{s+d}γ$, which is predicted to be effectively zero in the Standard Model (SM). A measurement of $2.5\%$ or more for this observable with the full BELLE II data would give $5σ$ evidence for physics beyond the SM. We display parameter space in the 3HDM for which such a clear signal is possible.

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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