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hep-ex2025
Measurements of the Absolute Branching Fraction of the Semileptonic Decay and the Axial Charge of the
BESIII Collaboration, M. Ablikim, M. N. Achasov +685
Using events collected with the BESIII detector, we study the semileptonic decay for the first time at an electron-…
hep-ex2025
Observation of the decay
BESIII Collaboration, M. Ablikim, M. N. Achasov +689
Using a dataset of events collected by the BESIII detector operating at the BEPCII collider, we report the first observation of the decay $…