Regular Article - Theoretical Physics
Hunting for the heavy quark spin symmetry partner of
Institute of Modern Physics, Chinese Academy of Sciences, 730000, Lanzhou, China
2 University of Chinese Academy of Sciences, 100049, Beijing, China
3 School of Physics, University of Electronic Science and Technology of China, 610054, Chengdu, China
Accepted: 25 January 2022
Published online: 21 February 2022
The discovery of a charged strange hidden-charm state (3985) implies another higher state coupling to under the heavy quark spin symmetry. In this paper we discuss a possible hunt for it with data taken at existing facilities. We point out a hint for in the data of at LHCb, though weak, in line with the production mechanism of pentaquark . We also study the triangular singularity which would possibly enhance the production of in electron-positron collision. Surprisingly, the production rate of is expected to be maximum at the center of mass energy of 4.648 GeV, which is lower than 4.681 GeV for due to the inverted coupling hierarchy of and in the triangle diagrams. Their bottom analogue under heavy quark flavor symmetry is also discussed. Our theoretical analysis would confront with future experiment of LHCb, BESIII, and Bell II.
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