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arXiv 2003.04165hep-ph
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光锥QCD中的$D D A$、$D^{*}D^{*}A$和$D^{*} D A$顶点并考虑$B^0\to {K}_{1}^{+} π^-$分支比

$D D A$, $D^{*}D^{*}A$ and $D^{*} D A$ vertices in the light-cone QCD and considering $B^0\to {K}_{1}^{+} π^-$ branching ratio

S. Momeni, R. Khosravi

摘要:

本文在光锥QCD求和规则的框架下研究了$D D A$,$D^{*}D^{*}A$和$D^{*} D A$顶点的强耦合常数,其中$A$是轴向矢量介子,类似于$a_1, b_1, K_{1A}, K_{1B}, K_1(1270)$和$K_1(1400)$ .利用$K_1(1270)$和$K_1(1400)$介子的$D_s D K_1$、$D_s^* D K_1$和$D_s^* D^* K_1$顶点的强耦合常数,计算了非轻子衰变$B^0\to {K}_{1}^{+}(1270,1400) π^-$的分支比.我们对这些衰变的分支比的计算结果与实验值符合得很好。

英文摘要:

We investigate the strong coupling constants of $D D A$, $D^{*}D^{*}A$ and $D^{*} D A$ vertices in the framework of the light-cone QCD sum rules, where $A$ is an axial vector meson such as $a_1, b_1, K_{1A}, K_{1B}, K_1(1270)$ and $K_1(1400)$. Using the strong coupling constants of $D_s D K_1$, $D_s^* D K_1$ and $D_s^* D^* K_1$ vertices for $K_1(1270)$ and $K_1(1400)$ mesons, we evaluated the branching ratios of the non-leptonic decays $B^0\to {K}_{1}^{+}(1270,1400) π^-$. Our results for the branching ratios of these decays are a good agreement with the experimental values.

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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