论文标题
$ x（3872）\ rightarrow j/ψπγ$和$ x（3872）\ rightarrow j/ψπγ$衰减
The $X(3872)\rightarrow J/ψπγ$ and $X(3872)\rightarrow J/ψππγ$ decays
论文作者
论文摘要
我们研究了$ρ$和$ω$梅森对辐射衰减的贡献$ x（3872）\ rightarrow j/ψπγ$和$ x（3872）\ rightarrow j/ψπγ$。 $ x（3872）\ rightarrow j/ψπγ$由$ω$ MESON主导。至于$ x（3872）\ rightArrow j/ψπγ$，级联反应通过$ρ$而损失的贡献，而$ω$中的介子在通过$ψ（2s）$或三个身体衰减的图表上强烈抑制了图表。 $ x（3872）\ rightArrow j/ψπγ$和$ x（3872）\ rightarrow j/ψπγ$的分支比为$（8.10^{+3.50} _ { - 2.88}） LHCB合作。 ESPECAILLY，$ x（3872）\ rightarrow j/ψπγ$和$ x（3872）\ rightArrow j/ψπ^+π^+π^ - γ$衰减可用于提取耦合$ g_ g_ g_ {xψΩ} $ g_ {xψω} $ and $ g_ g_ g_ {xarxψρ} $，iSoscal waverny the iSoscal wavertect the xoscal and the x. 分别。
We study the $ρ$ and $ω$ meson contribution to the radiative decays $X(3872)\rightarrow J/ψπγ$ and $X(3872)\rightarrow J/ψππγ$. The $X(3872)\rightarrow J/ψπγ$ is dominated by the $ω$ meson. As for the $X(3872)\rightarrow J/ψππγ$, the contributions of the cascade decays through the $ρ$ and $ω$ mesons are strongly suppressed with respect to the diagrams which proceed either through the $ψ(2S)$ or the three body decay of $ρ$. The branching ratios of $X(3872)\rightarrow J/ψπγ$ and $X(3872)\rightarrow J/ψππγ$ are $(8.10^{+3.50}_{-2.88})\times10^{-3}$ and $(2.38\pm1.06)\%$, which may be accessible by the BESIII and LHCb Collaborations. Especailly, the $X(3872)\rightarrow J/ψπγ$ and $X(3872)\rightarrow J/ψπ^+π^- γ$ decays can be employed to extract the couplings $g_{Xψω}$ and $g_{Xψρ}$, which probe the isoscalar and isovector components of the X(3872) wave function respectively.
