The proton-antiproton mass threshold structure in psi(3686) radiative decay revisited
High Energy Physics - Phenomenology
2013-05-30 v2 Nuclear Theory
Abstract
The near-threshold behavior of the ppbar invariant mass spectrum from the psi(3686) -> gamma ppbar decay reported recently by the BESIII Collaboration is analyzed. The enhancement in the ppbar invariant mass spectrum near threshold is nicely reproduced by the ppbar final-state interaction based on the isospin averaged 1S0 partial-wave amplitude as predicted by the Julich nucleon--antinucleon model. Contributions from the f_2(1910) or f_2(1950) mesons, as promoted in earlier works, are not needed.
Keywords
Cite
@article{arxiv.1208.3343,
title = {The proton-antiproton mass threshold structure in psi(3686) radiative decay revisited},
author = {J. Haidenbauer and Ulf-G. Meißner},
journal= {arXiv preprint arXiv:1208.3343},
year = {2013}
}
Comments
3 pages, 3 figures, chi^2 for the results added, to be published in Phys. Rev. D