High-precision measurement of the space-like $η^\prime$ transition form factor
BESIII Collaboration, M. Ablikim, M. N. Achasov, P. Adlarson et autres
Using a data sample corresponding to an integrated luminosity of $20.3\ \text{fb}^{-1}$, collected with the BESIII detector at a center-of-mass energy of $3.773\ \text{GeV}$ at the BEPCII collider, we report a precision measurement of the product $Q^2|F(Q^2)|$, where $F(Q^2)$ is the single-virtual …