X0(2900)and its heavy quark spin partners in molecular picture

• 作 者: Mei-Wei Hu Xue-Yi Lao Pan Ling Qian Wang
• 机 构: Guangdong Provincial Key Laboratory of Nuclear Science, Institute of Quantum Matter, South China Nor
• 出 处: 中国物理C（英文版）
• 发表日期: 2021年2期
• 关键词: exotic mesons hadron-hadron interaction heavy flavor hadron physics

The Xo(2900),recently observed by the LHCb Collaboration in the D-K+invariant mass of the B+->D+D-K+process,is the first exotic candidate with four different flavors,beginning a new era for the hadron community.Under the assumption that the Xo(2900)is a I(JP)= 0(0+)D*K* hadronic molecule,we extracted the whole heavy-quark symmetry multiplet formed by the(D,D*)doublet and the K* meson.For the bound state case,there would be two additional I(JP)= 0(1+)hadronic molecules associated with the DK* and D*K* channels,as well as one additional I(JP)= 0(2+)D*K* molecule.In the light quark limit,they are 36.66 MeV and 34.22 MeV below the DK* and D*K* thresholds,respectively,which are unambiguously fixed by the mass position of the Xo(2900).For the virtual state case,there would be one additional I(JP)= 0(1+)hadronic molecule,strongly coupled to the DK* channel,and one additional I(JP)= 0(2+)D*K* molecule.Searching for these heavy quark spin partners will help shed light on the nature of the X0(2900).