We propose a method based on the moments of the $D^{-}{K}^{+}$ mass distribution in the $B^{+}\to D^{+}{D}^{-}{K}^{+}$ decay to disentangle the contribution of the $2^{+}$ state, partner of $X_0(2900)$ in the ${\overline{D}}^{⁎}{K}^{⁎}$ picture for this resonance. Some of these moments show the interference patterns of the $X_1(2900)$ and $X_0(2900)$ with the $2^{+}$ state, which provide a clearer signal of the $2^{+}$ resonance than the $2^{+}$ signal alone. The construction of these magnitudes from present data is easy to implement, and based on these data we show that clear signals for that resonance should be seen even with the present statistics.

中文翻译：

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观察B+→D+D-K+反应中X0(2866)的JP=2+伙伴的方法

我们提出了一种基于矩的方法$D^{-}{ķ}^{+}$中的质量分布${乙}^{+}\to D^{+}{D}^{-}{ķ}^{+}$衰变解开的贡献$2^{+}$国家，合作伙伴$X_0(2900)$在里面${\overline{D}}^{⁎}{ķ}^{⁎}$这个共振的图片。其中一些时刻显示了$X_1(2900)$和$X_0(2900)$与$2^{+}$状态，这提供了一个更清晰的信号$2^{+}$共振比$2^{+}$单独发出信号。从目前的数据构建这些幅度很容易实现，并且基于这些数据，我们表明即使使用目前的统计数据也应该看到清晰的共振信号。