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arXiv 0904.0136hep-phhep-exnucl-th
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再散射机制下Y(4140)的隐魅衰变

The hidden charm decay of Y(4140) by the rescattering mechanism

Xiang Liu

摘要:

假设Y(4140)是P波粲偶素$χ_{cJ}^{\prime\prime}$($J=0, 1$)的第二径向激发,则根据再散射机制计算Y(4140)的隐魅衰变模式。我们的数值计算结果表明,对于Y(4140)的两种粲偶素假设,隐魅衰变$Y(4140)\to J/ψϕ$的分支比的上限都在$10^{-4}\sim 10^{-3}$的数量级,这不利于CDF实验所表明的大的隐魅衰变模式.这似乎揭示了P波粲偶素$χ_{cJ}^{\prime\prime}$($J=0, 1$)的纯第二径向激发是有问题的。

英文摘要:

Assuming that Y(4140) is the second radial excitation of the P-wave charmonium $χ_{cJ}^{\prime\prime}$ ($J=0, 1$), the hidden charm decay mode of Y(4140) is calculated in terms of the rescattering mechanism. Our numerical results show that the upper limit of the branching ratio of the hidden charm decay $Y(4140)\to J/ψϕ$ is on the order of $10^{-4}\sim 10^{-3}$ for both of the charmonium assumptions for Y(4140), which disfavors the large hidden charm decay pattern indicated by the CDF experiment. It seems to reveal that the pure second radial excitation of the P-wave charmonium $χ_{cJ}^{\prime\prime}$ ($J=0, 1$) is problematic.

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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