论文标题
关于$ω$梅森对$ x（3872）\ j/ψπ^+π^ - $和$ j/ψπ^+π^-π^0 $衰减的贡献的理论研究
Theoretical study on the contributions of $ω$ meson to the $X(3872) \to J/ψπ^+π^-$ and $J/ψπ^+π^-π^0$ decays
论文作者
论文摘要
除了从LHCB协作中的$ x（3872）\至J/ψπ^+π^ - $的新尺寸外，除了$ρ^0 $ MESON的主要贡献外，我们还对$ω$ Meson的贡献进行了理论研究J/ψπ^+π^-π^0 $过程。发现可以很好地再现了$π^+π^ - $不变质量分布的最新实验测量值，并且还评估了$ x（3872）\与j/ψρ^0 $和$ x（3872）\与j/ψω$之间的耦合比。在从$ x（3872）\到j/ψπ^+π^ - $过程的$π^+π^ - $不变质量分布中提取的参数中计算了$ x（3872）\至j/ψπ^+π^-π^0 $衰减的π^-π^0 $不变质量分布，这给出了进一步的高统计实验的提示。
With the newly measurements of $X(3872) \to J/ψπ^+π^-$ from LHCb Collaboration, in addition to the dominant contribution from the $ρ^0$ meson, we perform a theoretical study on the contribution of $ω$ meson in the $X(3872) \to J/ψπ^+π^-$ and $X(3872)\to J/ψπ^+π^-π^0$ processes. It is found that the recent experimental measurements on the $π^+ π^-$ invariant mass distributions can be well reproduced, and the ratio of the couplings between $X(3872) \to J/ψρ^0$ and $X(3872) \to J/ψω$ is also evaluated. Within the parameters extracted from the $π^+ π^-$ invariant mass distributions of the $X(3872) \to J/ψπ^+π^-$ process, the branching fractions of the $X(3872) \to J/ψω$ channel relative to that of the $X(3872) \to J/ψπ^+π^-π^0$ channel and the $π^+ π^- π^0$ invariant mass distributions of the $X(3872) \to J/ψπ^+π^-π^0$ decay are calculated, which gives a hint for the further high-statistic experiment.
