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Charmonium-like resonances and bound states with isospin zero and$J^{PC}=0^{++},~1^{--},~2^{++},~3^{--}$ are extracted on the lattice. Coupled$D\bar D$ and $D_s\bar D_s$ scattering suggests three charmonium-like stateswith $J^{PC}=0^{++}$ in addition to $\chi_{c0}(1P)$: a so far unobserved $D\barD$ bound state just below threshold, a conventional resonance likely related to$\chi_{c0}(3860)/\chi_{c0}(2P)$ and a narrow resonance just below the $D_s\barD_s$ threshold with a large coupling to $D_s\bar D_s$ likely related to$X(3915)/\chi_{c0}(3930)$. One-channel $D\bar D$ scattering renders resonancesand bound states with $J^{PC}= 1^{--},~2^{++},~3^{--}$ related to the observedconventional charmonia. Lattice QCD ensembles from the CLS consortium with$m_{\pi}\simeq 280$ MeV are utilized.

Charmonium-like resonances in coupled $D \bar D$-$D_s \bar D_s$ scattering