Productions of X(1835) as baryonium with sizable gluon content

Abstract

The X(1835) has been treated as a baryonium with sizable gluon content, and to be almost flavor singlet. This picture allows us to rationally understand X(1835) production in $J/\psi$ radiative decays, and its large couplings with $p\bar{p}$, ${\eta }^{\prime }\pi \pi$. The processes ${\rm Y}(1S)\to \gamma X(1835)$ and $J/\psi \to \omega X(1835)$ have been examined. It has been found that $Br({\rm Y}(1S)\to \gamma X(1835))Br(X(1835)\to p\bar{p})<6.45\times 10^{-7}$, which is compatible with CLEO's recently experimental result (Phys.Rev.$D73$ (2006) 032001;hep-ex/0510015). The branching fractions of $Br(J/\psi \to \omega X(1835))$, $Br(J/\psi \to \rho X(1835))$ with $X(1835)\to p\bar{p}$ and $X(1835)\to {\eta }^{\prime }{\pi }^{+}{\pi }^{-}$ have been estimated by the quark-pair creation model. We show that they are heavily suppressed, so the signal of X(1835) is very difficult, if not impossible, to be observed in these processes. The experimental checks for these estimations are expected. The existence of the baryonium nonet is conjectured, and a model independent derivation of their production branching fractions is presented.

arXiv comment21 pages, 4 figures

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Cited by in corpus (20)

• Confirmation of the X(1835) and observation of the resonances X(2120) and X(2370) in J/psi->gamma pi^+pi^-eta'
• Y(2175): Distinguish Hybrid State from Higher Quarkonium
• Categorizing resonances X(1835), X(2120) and X(2370) in the pseudoscalar meson family
• Observation of an anomalous line shape of the ${\eta }^{\prime }{\pi }^{+}{\pi }^{-}$ mass spectrum near the $p\bar{p}$ mass threshold in $J/\psi \to \gamma {\eta }^{\prime }{\pi }^{+}{\pi }^{-}$
• Observation and Spin-Parity Determination of the $X(1835)$ in $J/\psi \to \gamma K_S^0{K}_S^0\eta$
• Baryonia and near-threshold enhancements
• $X(1835)$ and the New Resonances $X(2120)$ and $X(2370)$ Observed by the BES Collaboration
• Observation of a structure at 1.84 GeV/c${}^2$ in the $3({\pi }^{+}{\pi }^{-})$ mass spectrum in $J/\psi \to \gamma 3({\pi }^{+}{\pi }^{-})$ decays
• Nucleon-antinucleon Interaction from the Modified Skyrme Model
• X(1835), X(2120) and X(2370) in a flux tube model
• First study of η_c, η(1760) and X(1835) production via η'π^+π^- final states in two-photon collisions
• Study of $\eta (1475)$ and $X(1835)$ in radiative $J/\psi$ decays to $\gamma \varphi$
• Observation of the Anomalous Shape of $X(1840)$ in $J/\psi \to \gamma 3({\pi }^{+}{\pi }^{-})$ Indicating a Second Resonance Near $p\bar{p}$ Threshold
• Measurement of the branching fraction of $J/\psi \to \omega {\eta }^{\prime }{\pi }^{+}{\pi }^{-}$ and search for $J/\psi \to \omega X(1835),X(1835)\to {\eta }^{\prime }{\pi }^{+}{\pi }^{-}$ decay
• Study of two-photon decays of pseudoscalar mesons via $J/\psi$ radiative decays
• Search for the decay ${\overline{B}}^0\to {\Lambda }_{\mathrm{c}}^{+}\overline{p}p\overline{p}$
• Protonium: Discovery and Prediction
• Decay Widths of X(1835) as Nucleon-Antinucleon Bound State
• Coupled-channel analysis of the near-threshold $e^{+}{e}^{-}\to N\bar{N}$ cross sections
• Baryons and baryoniums in the perspective of QCD sum rules