Method to observe the JP=2+ partner of the X0(2866) in the B+ → D+ D- K+ reaction

We propose a method based on the moments of the D- K+ mass distribution in the B+ -> D+ D- K+ decay to disentangle the contribution of the 2(+) state, partner of X-0(2900) in the (D) over bar *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. (C) 2022 The Author(s). Published by Elsevier B.V.

Automated summary

This article proposes a method based on moments of the mass distribution to untangle the contribution of the partner state of X-0(2900) in the resonance and demonstrates that this method can provide a clearer signal than the 2(+) signal alone.