2 papers
hep-ex2025
Precision Measurement of - Mass Difference
BESIII Collaboration, M. Ablikim, M. N. Achasov +684
We measure the mass difference between and , , using the decay chain , utilizing annihi…
hep-ex2025
Improved Measurements of and
BESIII Collaboration, M. Ablikim, M. N. Achasov +677
Using 20.3 fb of collision data collected at the center-of-mass energy of 3.773 GeV with the BESIII detector, we measure the branching fractions of …