Measurement of the space-like $\ddot{I}{€}^0$ transition form factor

BESIII Collaboration, M. Ablikim, M. N. Achasov +689

Based on $2.93{\text{fb}}^{-1}$ of $e^{+}{e}^{-}$ collision data taken with the BESIII detector at a center-of-mass energy of $3.773\text{GeV}$, the two-photon fusion process $e^+e^-\t…