X0(2866 ) as a D*K¯ * molecular state
Abstract
Very recently the LHCb Collaboration reported the discovery of two open charm tetraquark states, X0(2866 ) and X1(2904 ). In the present work, we study the D(*) and K¯(*) interaction in the one-boson exchange model and show that X0(2866 ) can be understood as a D*K¯* molecule with I (JP)=0 (0+) , or at least it has a large molecular component. On the other hand, X1(2904 ) can not be interpreted as a molecular state. Inspired by the discovery of X0(2866 ) and the fact that the D*K¯* interaction is strong enough to generate a bound state, we also discuss the likely existence of other open charm molecules. In the meson-meson sector, two molecules near the mass thresholds of D D* and D*D* with I (JP)=0 (1+) are obtained, and using the heavy quark flavor symmetry their B ¯B¯* and B¯*B¯* counterparts are also predicted. In the meson-baryon sector, seven open charm molecules with I =1 /2 near the mass thresholds of D(*)Σc(*) naturally appear, as dictated by the heavy quark spin symmetry.
- Publication:
-
Physical Review D
- Pub Date:
- November 2020
- DOI:
- 10.1103/PhysRevD.102.091502
- arXiv:
- arXiv:2008.07389
- Bibcode:
- 2020PhRvD.102i1502L
- Keywords:
-
- High Energy Physics - Phenomenology;
- High Energy Physics - Experiment
- E-Print:
- 2 tables, 4 figures