Penta-quark states with hidden charm and beauty

Abstract

More and more hadron states are found to be difficult to be accommodated by the quenched quark models which describe baryons as 3-quark states and mesons as antiquark-quark states. Dragging out an antiquark-quark pair from the gluon field in hadrons should be an important excitation mechanism for hadron spectroscopy. Our recent progress on the penta-quark states with hidden charm and beauty is reviewed.

Plenary talk at the 5th Asia-Pacific Conference on Few-Body Problems in Physics 2011 (APFB2011), 22-26 Aug., 2011, Seoul, Korea

References in corpus (12)

• Prediction of narrow $N^{\ast }$ and ${\Lambda }^{\ast }$ resonances with hidden charm above 4 GeV
• Xi and Omega baryons in the Skyrme model
• The role of $N^{\ast }(1535)$ in $pp\to pp\varphi$ and ${\pi }^{-}p\to n\varphi$ reactions
• Coupling vector and pseudoscalar mesons to study baryon resonances
• Evidence for a new ${\Sigma }^{\ast }$ resonance with $J^P=1/2^{-}$ in the old data of $K^{-}p\to \Lambda {\pi }^{+}{\pi }^{-}$ reaction
• The role of the $qqqq\bar{q}$ components in the electromagnetic transition ${\gamma }^{\ast }N\to N^{\ast }(1535)$
• The role of $N^{\ast }(1535)$ in ${\eta }^{\prime }$ production
• The role of the N*(1535) resonance and the pi^- p --> KY amplitudes in the OZI forbidden pi N --> phi N reaction
• Role of the $N^{\ast }$(1535) in the $J/\psi \to \bar{p}\eta p$ and $J/\psi \to \bar{p}{K}^{+}\Lambda$ reactions
• Measurement of ${\pi }^0\Lambda$, ${\bar{K}}^{0}n$, and ${\pi }^0{\Sigma }^0$ production in $K^{-}p$ interactions for $p_{K^{-}}$ between 514 and 750 MeV/$c$
• Evidence of N*(1535) resonance contribution in the pn->dϕreaction
• Observation of two charged bottomonium-like resonances