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arXiv 0811.0586hep-ex
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chi_c0和chi_c2到两介子末态排斥衰变的新测量

New Measurement of Exclusive Decays of the chi_c0 and chi_c2 to Two-Meson Final States

CLEO Collaboration, D. M. Asner

摘要:

利用CLEO-c探测器收集的2.59 × 10^7 psi(2S)衰变样品,我们给出了chi_{c0}和chi_{c2}衰变到两介子末态的研究结果。我们提出了世界上最精确的测量chi_{cJ,(J=0,2)} -> pi^+pi^-,pi^0 pi^0,K^+K^-,K^0_S K^0_S,eta eta和eta^{prime} eta^{prime}分支分数,并寻找chi_c衰变到eta eta^{prime}。这些结果揭示了粲偶素衰变为赝标介子的机制。

英文摘要:

Using a sample of 2.59 times 10^7 psi(2S) decays collected by the CLEO--c detector, we present results of a study of chi_{c0} and chi_{c2} decays into two-meson final states. We present the world's most precise measurements of the chi_{cJ,(J=0,2)} -> pi^+pi^-, pi^0 pi^0, K^+K^-, K^0_S K^0_S, eta eta and eta^{prime} eta^{prime} branching fractions, and a search for chi_c decays into eta eta^{prime}. These results shed light on the mechanism of charmonium decays into pseudoscalar mesons.

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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