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arXiv 1312.7664hep-ph
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$ψ$(3686)、$ψ$(4040)、$ψ$(4160)、Y(4260)、$ψ$(4415)和X(4630)charmonia样状态

Status of $ψ$ (3686), $ψ$ (4040), $ψ$ (4160), Y (4260), $ψ$ (4415) and X (4630) charmonia like states

Manan Shah, Kaushal Thakkar, Arpit Parmar, P C Vinodkumar

摘要:

我们通过观察激发态charmonia轻子衰变宽度的能级差异和规律性来研究charmonia类态的状态。用唯象的类马丁禁闭势研究了光谱态,并用它们的径向波函数计算了双轻子衰变宽度。它们与预期行为的偏差提供了一个线索,可以将它们视为附近S态和D态的混合物。本分析强烈支持$\backslash$ psi(3686)作为$c \bar{c}$(2S)和$c \bar{c}$ g的混合物(4.1GeV)杂合体、$\backslash$ psi(4040)和$\backslash$ psi(4160)作为Charmonia(3S,3D)态,混合角分别为$\backslash$ θ = 11 $^\circ$和45 $^\circ$。我们确定Y(4260)是一个纯的$c \bar{c}$(4S)态,其轻子衰变被预测为0.65 keV。而X(4630)更接近于$c \bar{c}$(6S)状态。$\backslash$ psi(4415)的状态仍不清楚,因为它不适合为纯态或混合态。

英文摘要:

We examine the status of charmonia like states by looking into the behaviour of the energy level differences and regularity in the behaviour of the leptonic decay widths of the excited charmonia states. The spectroscopic states are studied using a phenomenological Martin-like confinement potential and their radial wave functions are employed to compute the di-leptonic decay widths. Their deviations from the expected behaviour provide a clue to consider them as admixtures of the nearby S and D states. The present analysis strongly favour \$$\backslash$psi \$ (3686) as admixture of $c \bar{c}$ (2S) and $c \bar{c}$g (4.1 GeV) hybrid, \$$\backslash$psi \$ (4040) and \$$\backslash$psi \$ (4160) as admixture states of charmonia (3S, 3D) states with mixing angle \$$\backslash$theta \$ = 11$^\circ$ and 45$^\circ$ respectively. We identify Y (4260) as a pure $c \bar{c}$ (4S) state whose leptonic decay is predicted as 0.65 keV. While X(4630) is closer to the $c \bar{c}$ (6S) state. The status of \$$\backslash$psi \$ (4415) is still not clear as it does not fit to be pure or admixture state.

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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