The paper predicts a scalar cc-ccbar tetraquark state (X(6400)) and identifies it as the partner to the recently observed tensor state X(6600).
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Coupled-channel calculations show Pc and Pcs states as molecular bound states with RMS radii 0.5-2 fm when heavy-quark spin symmetry is respected across all channels.
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Predictions for the scalar partner of the LHC tetraquark $X(6600)$
The paper predicts a scalar cc-ccbar tetraquark state (X(6400)) and identifies it as the partner to the recently observed tensor state X(6600).
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Study of the molecular Properties of the $P_c$ and $P_{cs}$ States
Coupled-channel calculations show Pc and Pcs states as molecular bound states with RMS radii 0.5-2 fm when heavy-quark spin symmetry is respected across all channels.