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arXiv 1307.2622hep-phhep-ex
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在$D_1(2420)\bar D +c.c$分子态下研究$Y(4260)$的可能衰变模式

Investigating possible decay modes of $Y(4260)$ under the $D_1(2420)\bar D +c.c$ molecular state ansatz

Gang Li, Xiao-Hai Liu

摘要:

在假定$Y(4260)$为$D_1\bar D$分子态的基础上,利用有效拉格朗日方法研究了$Y(4260)$通过中间$D_1\bar D$介子环的一些隐粲和粲对衰变通道.通过研究不同衰变道的分支比和比率对$α$的依赖性,我们发现中间$D_1 \bar D$介子环是驱动$Y(4260)$跃迁的关键.耦合沟道效应在$Y(4260) \to D^{*}\bar{D}^{*}$中更为重要,这一点可以在以后的实验中进行验证。

英文摘要:

By assuming that $Y(4260)$ is a $D_1\bar D$ molecular state, we investigate some hidden-charm and charmed pair decay channels of $Y(4260)$ via intermediate $D_1\bar D$ meson loops with an effective Lagrangian approach. Through investigating the $α$-dependence of branching ratios and ratios between different decay channels, we show that the intermediate $D_1 \bar D$ meson loops are crucial for driving these transitions of $Y(4260)$ studied here. The coupled channel effects turn out to be more important in $Y(4260) \to D^{*}\bar{D}^{*}$, which can be tested in the future experiments.

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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