arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2011.05185hep-ph
收藏

$D^+\to K^-K^+K^+$衰变中的标量共振

Scalar resonances in the $D^+\to K^-K^+K^+$ decay

L. Roca, E. Oset

摘要:

从理论上研究了双Cabibbo抑制$D^+\to K^- K^+K^+$衰变的共振结构。我们开始从一个基本的生产图,考虑subleading在以前的方法,不能产生一个最终的$K^- K^+$对在树的水平,但我们表明能够通过最终的介子-介子状态相互作用提供的衰变的强度。不同的介子-介子基本产生通过SU(3)联系起来,最后的再散射通过ChPT的幺正扩展的适当实现来实现,它动态地产生标量共振$f_0(980)$和$a_0(980)$ .我们获得了很好的协议与最近的实验数据从LHCb合作的最小自由度的配合,并显示优势的$a_0(980)$贡献接近阈值的$K^- K^+$频谱。

英文摘要:

We study theoretically the resonant structure of the double Cabibbo suppressed $D^+\to K^- K^+K^+$ decay. We start from an elementary production diagram, considered subleading in previous approaches, which cannot produce a final $K^- K^+$ pair at the tree level but which we show to be able to provide the strength of the decay through final meson-meson state interaction. The different meson-meson elementary productions are related through SU(3) and the final rescattering is implemented from a suitable implementation of unitary extensions of ChPT which generate dynamically the scalar resonances $f_0(980)$ and $a_0(980)$. We obtain a good agreement with recent experimental data from the LHCb collaboration with a minimal freedom in the fit and show the dominance of the $a_0(980)$ contribution close to the threshold of the $K^- K^+$ spectrum.

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。

↑