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arXiv 0906.4996hep-ex
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CDF上奇异类Charmonium态的性质

Properties of Exotic Charmonium-like States at CDF

Kai Yi

摘要:

我们报告了一个新的窄结构,Y(4140),衰减到$J/ψϕ$的最终状态,在排他性的$B^+\to J/ψϕK^+$衰变在CDF II探测器收集的数据样本对应的积分亮度为2.7 \ifb的最新证据。这种狭窄的结构,其质量远高于开放的魅力对,不太可能是一个传统的粲偶素状态的候选者。通过对世界上最大的$X(3872)\to J/ψπ^+π^-$衰变样品的X(3872)质量和宽度的研究,我们发现我们的X(3872)信号与单个态一致,并导致X(3872)质量的最精确测量。

英文摘要:

We report the recent evidence for a new narrow structure, Y(4140), decaying to the $J/ψϕ$ final state, in exclusive $B^+\to J/ψϕK^+$ decays in a data sample corresponding to an integrated luminosity of 2.7 \ifb collected at the CDF II detector. This narrow structure with its mass well above open charm pairs is unlikely to be a candidate for a conventional charmonium state. From a study of the X(3872) mass and width based on the world's largest sample of $X(3872)\to J/ψπ^+π^-$ decays, we find that our X(3872) signal is consistent with a single state, and leads to the most precise measurement of the X(3872) mass.

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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