Role of the newly measured B→KD̅D process to establish χc0(2P) state.

In this work, the branching ratio B[B→Kχc0(2P)] is extracted for the first time through the fit fractions in the newly measured B→KD̅D process by LHCb. With the rescattering mechanism, this extracted branching ratio is reproduced well. Our study further enforces the role of the newly measured B→KD̅D process to establish the χc0(2P) charmonium state, which is a crucial step when constructing the charmonium family. [ABSTRACT FROM AUTHOR]