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arXiv 0901.3463hep-ph
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\the顶色辅助人工色模型中稀有衰变$B_s\to l^+l^-$和$B\to Kl^+l^-$

Rare decays $B_s\to l^+l^-$ and $B\to Kl^+l^-$ in \the topcolor-assisted technicolor model

Wei Liu, Chong-Xing Yue, Hui-Di Yang

摘要:

我们在顶色辅助人工色($TC2$)模型的框架下研究了稀有衰变$B_s\to l^+l^-$和$B\to Kl^+l^-$.该模型预测的新粒子对这些罕见的衰变过程的贡献进行了评估。我们发现,它们的分支比的值比标准模型预测的大一个数量级的参数空间的宽范围内。$B_s \to l^+l^-$中轻子的纵向极化不对称性可以接近$\ord(10^{-2})$。$B \to Kl^+l^-$中轻子的前后不对称性还不够大,无法在未来的实验中测量。我们还讨论了T宇称的最小Higgs模型中与这些稀有衰变过程有关的分支比和不对称观测量。

英文摘要:

We examine the rare decays $B_s\to l^+l^-$ and $B\to Kl^+l^-$ in the framework of the topcolor-assisted technicolor ($TC2$) model. The contributions of the new particles predicted by this model to these rare decay processes are evaluated. We find that the values of their branching ratios are larger than the standard model predictions by one order of magnitude in wide range of the parameter space. The longitudinal polarization asymmetry of leptons in $B_s \to l^+l^-$ can approach $\ord(10^{-2})$. The forward-backward asymmetry of leptons in $B \to Kl^+l^-$ is not large enough to be measured in future experiments. We also give some discussions about the branching ratios and the asymmetry observables related to these rare decay processes in the littlest Higgs model with T-parity.

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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