From the 1 of 58 linked papers with an AI index.
58 papers
Measurement of the double Dalitz decay
BESIII Collaboration, M. Ablikim, M. N. Achasov +689
The BESIII experiment measured the rare decay of the eta meson into two electron-positron pairs, determining its branching fraction to be about 2.6 × 10⁻⁵.
Amplitude analysis and branching fraction measurement of the decay
BESIII Collaboration, M. Ablikim, M. N. Achasov +703
An amplitude analysis of the decay is performed to determine the relative magnitudes and phases of different intermediate processes. The analysis uses $e^…
Observation of the decays into
BESIII Collaboration, M. Ablikim, M. N. Achasov +780
By analyzing events collected with the BESIII detector operating at the BEPCII collider, the decays $Ï_{cJ} \to pK^{-}\barÎη+ \mathr…
Evidence of
BESIII Collaboration, M. Ablikim, M. N. Achasov +766
We report the first evidence for the hadronic transition using a data sample of collected at ~GeV with the BESIII…
Strong and electromagnetic amplitudes, direct and isospin asymmetries in the decays
BESIII Collaboration, M. Ablikim, M. N. Achasov +766
Using annihilation data collected at 26 center-of-mass energy points between 3000.00 and with the BESIII detector, corresponding to a total integrated…
Unexpected large relative strong phase and search for isospin breaking and asymmetries in $J/Ï\to K^*(892)\bar K
BESIII Collaboration, M. Ablikim, M. N. Achasov +766
Using a direct scan of 26 energy points near the resonance, we perform the first measurement of the relative phase between the strong and electromagnetic ampli…