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-ex2024
Search for the double Dalitz decays and
BESIII Collaboration, M. Ablikim, M. N. Achasov +653
Using a data sample of events collected with the BESIII detector, we search for the decays and $η' \to μ^+μ^-΅