Status and Prospects of Exotic Hadrons at Belle II

  • In the past 20 years, many new hadrons that are difficult to explain within the conventional quark model have been discovered in the quarkonium region; these are called exotic hadrons. The Belle II experiment, as the next-generation B factory, provides a good platform for exploring them. The charmonium-like states can be produced at Belle II in several ways, such as B meson decays, initial-state radiation processes, two-photon collisions and double charmonium production. Bottomonium-like states can be produced directly in e+e colliding energies at Belle II with low continuum backgrounds. Belle II plans to perform a high-statistics energy scan from the BB¯ threshold up to the highest possible energy of 11.24 GeV to search for new Yb states with JPC = 1−−, Xb the bottom counterpart of χc1(3872), also known as X(3872) and partners of Zb states. We give a mini-review on the status and prospects of exotic hadrons at Belle II.
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