In the most recent measurements of the reaction e+e−→ppˉ 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 Φ(2170). Alternatively, we analyse possible explanations due to the nucleonΔˉ and ΔΔˉ thresholds. The latter could explain a periodicity found in the data.
@article{arxiv.1506.02282,
title = {New structures in the proton-antiproton system},
author = {I. T. Lorenz and H. -W. Hammer and U. -G. Meißner},
journal= {arXiv preprint arXiv:1506.02282},
year = {2015}
}