The possibility of X(4014) as a $$D^*{\bar{D}}^*$$ D ∗ D ¯ ∗ molecular state

Abstract

Abstract Within the framework of the local hidden gauge approach, we have studied the near-threshold $$D^* {\bar{D}}^*$$ D ∗ D ¯ ∗ interaction with quantum numbers $$I(J^{PC}) = 0(0^{++})$$ I ( J PC ) = 0 ( 0 + + ) , $$0(2^{++})$$ 0 ( 2 + + ) , $$1(0^{++})$$ 1 ( 0 + + ) , and $$1(2^{++})$$ 1 ( 2 + + ) , respectively. The contact term and vector meson exchange term in coupled channels are taken into account in this work. One pole, which is found in the case of the quantum numbers $$I(J^{PC}) = 0(0^{++})$$ I ( J PC ) = 0 ( 0 + + ) , could be associated to the X(4014) recently observed by the Belle Collaboration. Thus, we suggest that the X(4014) may be an $$D^* {\bar{D}}^*$$ D ∗ D ¯ ∗ molecular state with $$I(J^{PC}) = 0(0^{++})$$ I ( J PC ) = 0 ( 0 + + ) , and more precise information about X(4014), such as resonance parameters and decay properties, could be useful to shed light on its structure.