Feasibility studies of time-like proton electromagnetic form factors at $\overline{\rm P}$ANDA at FAIR

Simulation results for future measurements of electromagnetic proton form factors at \(\overline{\rm P}\)ANDA (FAIR) within the PandaRoot software framework are reported. The statistical precision with which the proton form factors can be determined is estimated. The signal channel \(\bar{p}p\rightarrow e^{+}e^{-}\) is studied on the basis of two different but consistent procedures. The suppression of the main background channel, i.e. \(\bar{p}p\rightarrow \pi^{+}\pi^{-}\), is studied. Furthermore, the background versus signal efficiency, statistical and systematical uncertainties on the extracted proton form factors are evaluated using two different procedures. The results are consistent with those of a previous simulation study using an older, simplified framework. However, a slightly better precision is achieved in the PandaRoot study in a large range of momentum transfer, assuming the nominal beam conditions and detector performance.