如何理解$X(4140)$、$X(4274)$、$X(4500)$和$X(4700)$的基本结构
How to understand the underlying structures of $X(4140)$, $X(4274)$, $X(4500)$ and $X(4700)$
摘要：
我们调查可能的再散射效应，这可能有助于过程$B^+\to J/ψϕK^+$。结果表明，$D_{s}^{*+}D_{s}^-$通过开粲介子环的再散射和$ψ^\prime ϕ$通过$ψ^\prime K_1$环的再散射分别模拟了$X(4140)$和$X(4700)$的结构.然而，如果$X(4274)$（$X(4500)$）的量子数是$1^{++}$（$0^{++}$），则很难将$X(4274)$和$X(4500)$的观测归因于$P$波阈值再散射效应，这意味着$X(4274)$和$X(4500)$可能是真正的共振。我们还认为，$X(4274)$可能是传统的轨道激发态$χ_{c1}(3P)$。
英文摘要：
We investigate the possible rescattering effects which may contribute to the process $B^+\to J/ψϕK^+$. It is shown that the $D_{s}^{*+}D_{s}^-$ rescattering via the open-charmed meson loops, and $ψ^\prime ϕ$ rescattering via the $ψ^\prime K_1$ loops may simulate the structures of $X(4140)$ and $X(4700)$, respectively. However, if the quantum numbers of $X(4274)$ ($X(4500)$) are $1^{++}$ ($0^{++}$), it is hard to to ascribe the observation of $X(4274)$ and $X(4500)$ to the $P$-wave threshold rescattering effects, which implies that $X(4274)$ and $X(4500)$ could be genuine resonances. We also suggest that $X(4274)$ may be the conventional orbitally excited state $χ_{c1}(3P)$.
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