2 papers
hep-ex2025
Study of the electromagnetic Dalitz decay
BESIII Collaboration, M. Ablikim, M. N. Achasov +640
We report the first measurement of the di-electron invariant mass dependent transition form factor in the electromagnetic Dalitz decay using $(10087 \pm 44) \…
hep-ex2025
Observation of the charmonium decay in
BESIII Collaboration, M. Ablikim, M. N. Achasov +662
Using events collected with the BESIII detector at the BEPCII collider, the decay in is observed. We determin…