Heavy Flavor Hadron Physics at Belle and Belle II

Kenkichi Miyabayashi

25 September 2019
J-PARC 10th anniversary symposium

Abstract: The Quantum Chromo Dynamics (QCD), the basic theoretical framework of the strong interaction, has been well tested at its perturbative region. While understanding about the mechanism to form hadrons from quarks and gluons are still incomplete, thus many attempts are being made to figure out the picture of proper hadrons constituents, which is called the effective degree of freedom of hadrons. By the previous B-factories, BaBar and Belle experiments, many exotic state candidates were discovered. They are so-called XYZ states and thought to have different structures from ordinary mesons and baryons. Studying those states is effective to determine the effective degree of freedom to form hadrons for us because establishing the interpretations directly corresponds to identify the proper constituents and structures. In this contribution, I try to review compilation of experimental measurements of various branching fractions and searches for partner states for the exotic candidate states at Belle and its competitors, BaBar and LHCb. Prospects and commissioning status of the next generation intensity frontier electron-positron colliding beam experiment, Belle II, are also reported.

Keyword(s): Heavy Flavor ; Hadron Physics ; Belle and Belle II

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 Record created 2019-10-25, last modified 2019-10-25

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