New structures in the proton-antiproton system

Understand

In the most recent measurements of the reaction $e^+e^- \rightarrow p\bar{p}$ by the BABAR collaboration, new structures have been found with unknown origin.

• We examine a possible relation of the most distinct peak to the recently observed $\Phi(2170)$.
• Alternatively, we analyse possible explanations due to the nucleon$\,\bar{\Delta}$ and $\Delta\bar{\Delta}$ thresholds.
• The latter could explain a periodicity found in the data.