Coupled-channel D*K*−Ds
Man-Yu Duan (School of Physics, Southeast University, Nanjing 210094, China); Meng-Lin Du (School of Physics, University of Electronic Science and Technology of China, Chengdu 611731, China); Zhi-Hui Guo (Department of Physics and Hebei Key Laboratory of Photophysics Research and Application, Hebei Normal University, Shijiazhuang 050024, China); En Wang (School of Physics and Microelectronics, Zhengzhou University, Zhengzhou, Henan 450001, China, Guangxi Key Laboratory of Nuclear Physics and Nuclear Technology, Guangxi Normal University, Guilin 541004, China); Dian-Yong Chen (School of Physics, Southeast University, Nanjing 210094, China, Lanzhou Center for Theoretical Physics, Lanzhou University, Lanzhou 730000, China)
Motivated by the recent observation of Tcˉs0(2900)0 and Tcˉs0(2900)++ in the Dsπ invariant mass distributions, we investigate D*K* interactions in a coupled-channel approach. Within the hidden local symmetry formalism, a sizable attraction interaction is found in the J=0 isospin triplet sector that can form a bound or a virtual state, which is consistent with the experimentally observed Tcˉs0(2900). By reproducing a D*sρ−D*K* bound/virtual state with the pole mass equal to that of the Tcˉs0(2900) measured by LHCb in the sector (I,J)=(1,0), we determine the unknown parameter in the loop function, and then search for possible poles in the sectors of I=1, J=1, 2 and I=0, J=0, 1, 2. The predicted resonances provide a useful reference for the future experimental studies of the (C,S)=(1,1) systems and can be also helpful to unravel the nature of the Tcˉs0(2900).