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hep-ex2026
First measurement of the masses of the and states and the energy dependence of the cross sections for and
Belle, Belle II Collaborations, : +398
We study the processes and at center-of-mass energies =(10.73 -- 11.02) GeV using a data sample, in…
hep-ex2026
Observation of the decays and
Belle, Belle II Collaborations, : +403
We report the first observation of the decays and , with significances of a…