New structures in the proton-antiproton system

Abstract

In the most recent measurements of the reaction $e^{+}{e}^{-}\to p\bar{p}$ 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.

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