arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2402.02539hep-phhep-ex
收藏

$a_0(1710)$-$f_0(1710)$ 混合效应在 $D_{s}^{+} \ ightarrow K_S^{0} K_S^{0} π^{+}$ 衰变中

$a_0(1710)$-$f_0(1710)$ mixing effect in the $D_{s}^{+} \rightarrow K_S^{0} K_S^{0} π^{+}$ decay

Yu-Wen Peng, Wei Liang, Xiaonu Xiong, Chu-Wen Xiao

AI总结:

研究 $D_s^+ \ o K_S^0 K_S^0 π^+$ 衰变,通过手征幺正方法拟合 BESIII 数据,揭示 $a_0(1710)$ 与 $f_0(1710)$ 的混合信号及其分子本质。

摘要:

基于 BESIII 合作组对衰变 $D^+_s \ ightarrow K^0_S K^0_S π^+$ 的测量,我们通过手征幺正方法研究该三体弱衰变中的末态相互作用,其中共振态 $S(980)$ 和 $S(1710)$ 由十一个耦合道的相互作用动力学产生,并在夸克层面考虑 $W$ 外发射和内发射机制。此外,我们还考虑了 $P$ 波共振态 $K^*(892)^+$ 的贡献,并对 BESIII 合作组测量的 $K^0_S K^0_S$ 和 $K^0_S π^+$ 不变质量谱进行了联合拟合。拟合结果显示,$K^0_S K^0_S$ 质量谱中约 1.7 GeV 处的增强与两个可见峰重叠,表明该信号源于共振态 $a_0(1710)$ 和 $f_0(1710)$ 因不同极点(质量)而产生的混合信号。因此,衰变 $D^+_s \ ightarrow K^0_S K^0_S π^+$ 有助于揭示其分子性质,且该混合信号可在未来得到更精确的测量。

英文摘要:

With the measurements of the decay $D^+_s \rightarrow K^0_S K^0_S π^+$ by the BESIII Collaboration, we investigate this three-body weak decay via the chiral unitary approach for the final state interaction, where the resonances $S(980)$ and $S(1710)$ are dynamically reproduced with the interaction of eleven coupled channels, and the $W$-external and -internal emission mechanisms are considered at the quark level. Besides, we also take into account the contribution from the $P$-wave resonance $K^*(892)^+$ and make a combined fit of the $K^0_S K^0_S$ and $K^0_S π^+$ invariant mass spectra measured by the BESIII Collaboration. The fitted results show that the enhancement around 1.7 GeV in $K^0_S K^0_S$ mass spectrum is overlapped with two visible peaks, indicating the mixing signal originated from the resonances $a_0(1710)$ and $f_0(1710)$ due to their different poles (masses). Thus, the decay $D^+_s \rightarrow K^0_S K^0_S π^+$ is helpful to reveal their molecular nature with the mixing signal, which can be more precisely measured in the future.

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。

↑