A Lattice Study of ( D̄ 1 D ∗ ) ± Near-threshold Scattering

(CLQCD Collaboration) School of Physics, Peking University, Beijing 100871, China Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China School of Science, Xi’an Technological University, Xi’an 710032, China School of Physics and Center for High Energy Physics, Peking University, Beijing 100871, China Collaborative Innovation Center of Quantum Matter, Beijing 100871, China School of Physics, Nankai University, Tianjin 300071, China Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China Department of Physics, Zhejiang University, Hangzhou 311027, China In this exploratory lattice study, low-energy near threshold scattering of the (D̄1D ∗)± meson system is analyzed using lattice QCD with Nf = 2 twisted mass fermion configurations. Both swave (J = 0−) and p-wave (J = 1) channels are investigated. It is found that the interaction between the two charmed mesons is attractive near the threshold in both channels. This calculation provides some hints in the searching of resonances or bound states around the threshold of (D̄1D ∗)± system.