The proton-antiproton mass threshold structure in psi(3686) radiative decay revisited

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.

3 pages, 3 figures, chi^2 for the results added, to be published in Phys. Rev. D

References in corpus (5)

• Confirmation of the X(1835) and observation of the resonances X(2120) and X(2370) in J/psi->gamma pi^+pi^-eta'
• Spin-Parity Analysis of ppbar Mass Threshold Structure in J/psi and psi' Radiative Decays
• Study of psi(2S) Decays to gamma p bar{p}, pi^0 p bar{p} and eta p bar{p} and Search for p bar{p} Threshold Enhancements
• ppbar enhancement in B and J/Psi decay
• Partial waves of baryon-antibaryon in three-body B meson decay

Cited by in corpus (4)

• The electromagnetic form factors of the proton in the timelike region
• Dispersion-theoretical analysis of the electromagnetic form factors of the nucleon: Past, present and future
• On the near-threshold $\bar{p}p$ invariant mass spectrum measured in $J/\psi$ and ${\psi }^{\prime }$ decays
• Looking for bound states and resonances in the ${\eta }^{\prime }K\bar{K}$ system