3 papers
hep-ex2023
First Experimental Study of the Purely Leptonic Decay
BESIII Collaboration, M. Ablikim, M. N. Achasov +615
Using of collision data taken with the BESIII detector at the BEPCII collider, we report the first experimental study of the purely leptonic decay…
hep-ex2023
Measurement of the Branching Fraction for the Decay
BESIII Collaboration, M. Ablikim, M. N. Achasov +592
Based on events collected with the BESIII detector operating at the BEPCII collider, the decay is…
hep-ex2022
First Direct Measurement of the Absolute Branching Fraction of
BESIII Collaboration, M. Ablikim, M. N. Achasov +591
The first direct measurement of the absolute branching fraction of is reported based on an annihilation sample of eve…