ppbar enhancement in B and J/Psi decay

Abstract

The near-threshold enhancement in the ppbar invariant mass spectrum from the B^+ -> K^+ ppbar decay reported recently by the BaBar Collaboration is studied within the Jülich NNbar model. We illustrate that the invariant mass dependence of the ppbar spectrum close to the threshold can be reproduced by the final state interactions. This explanation is in line with our previous analysis of the ppbar invariant mass spectrum from the J/Psi -> gamma ppbar decay measured by the BES Collaboration. We also comment on a structure found recently in the pi^+ pi^- eta' mass spectrum of the radiative J/Psi decay by the BES Collaboration. In particular we argue that one should be rather cautions in bringing this structure in connection with the enhancement found in the ppbar invariant mass spectrum or with the existence of NNbar bound states.

arXiv comment4 pp, 2 figs, uses revtex4

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Cited by in corpus (34)

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• Reconciling the X(4630) with the Y(4660)
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• On the near-threshold $\bar{p}p$ invariant mass spectrum measured in $J/\psi$ and ${\psi }^{\prime }$ decays
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• The bound state problem of S-wave heavy quark meson-aitimeson systems
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• Measurements of psi'-> pbar K+ sigma0 and chi_cj->pbar K+ Lambda
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• Near threshold ppbar enhancement in the J/psi -> omega ppbar decay
• $J/\psi \to \gamma {\eta }^{\prime }{\pi }^{+}{\pi }^{-}$ and the structure observed around the $\bar{p}p$ threshold
• Evidence for the decay B0 --> K+K-pi0
• Observation of the Decay \bar{B0}-> Ds+ Lambda \bar{p}
• $N\bar{N}$ Scattering at NLO Order in An Effective Theory
• Final stare interaction enhancement effect on the near threshold p\bar p system in B^\pm\to p\bar p \p^\pm decay
• Final State Interaction Effects in the $e^{+}{e}^{-}\to N\bar{N}$ Process near Threshold
• Invariant-mass spectrum of $\Lambda \bar{\Lambda }$ pair in the process $e^{+}{e}^{-}\to \varphi \Lambda \bar{\Lambda }$
• The proton-antiproton mass threshold structure in psi(3686) radiative decay revisited
• Evidence for the decay $B^0\to p\bar{p}{\pi }^0$
• Observation of the decays ${\chi }_{cJ}\to n{K}_S^0\bar{\Lambda }+c.c.$
• Spin dependence of the antinucleon-nucleon interaction
• Hadronic rescattering to solve helicity puzzle in $B^{+}\to p\bar{p}{\pi }^{+}(K^{+})$ decays
• Search for baryonium and the physics at FAIR
• Phenomenological Analysis of the Decay $B^{\pm}\to K^{\pm} p {\bar p}