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arXiv 0901.2782hep-ph
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理解标准模型中的B -->J/T

Understanding B -->J/Ψϕin the Standard Model

Ying Li, Hai-Yang Cheng

摘要:

稀有衰变$\bar B_d^0\to J/ψϕ$可以通过四种不同的机制进行:(i)通过三胶子融合产生$ϕ$,(ii)光生$J/ψ$或$ϕ$,(iii)在$\bar B_d$衰变中产生的$D_s^{(*)}D_s^{(*)}$的终态再散射为$J/ψϕ$,以及(iv)通过$ω-ϕ$混合产生$ϕ$。在这项工作中,我们研究的贡献,从光生和最终状态再散射$\bar B_d^0\to J/ψϕ$,并发现相应的分支比的顺序分别为$10^{-11}$和$10^{-9}$。因此,这种衰减由$ω-ϕ$混合效应主导。

英文摘要:

The rare decay $\bar B_d^0\to J/ψϕ$ can proceed in four distinct mechanisms: (i) production of the $ϕ$ via tri-gluon fusion, (ii) photoproduction of the $J/ψ$ or $ϕ$, (iii) final-state rescattering of $D_s^{(*)}D_s^{(*)}$ produced in the $\bar B_d$ decay to $J/ψϕ$, and (iv) production of the $ϕ$ via $ω-ϕ$ mixing. In this work, we examine the contributions from photoproduction and final-state rescattering to $\bar B_d^0\to J/ψϕ$ and find that the corresponding branching ratios are of order $10^{-11}$ and $10^{-9}$, respectively. Hence, this decay is dominated by the $ω-ϕ$ mixing effect.

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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