TL;DR
This paper reviews recent progress in understanding penta-quark states with hidden charm and beauty, highlighting their significance in hadron spectroscopy beyond traditional quark models.
Contribution
It introduces new insights into penta-quark states with hidden charm and beauty, emphasizing their role as important excitations in hadron spectroscopy.
Findings
Identification of penta-quark states with hidden charm and beauty
Challenges to traditional quenched quark models
Significance of antiquark-quark pair excitations
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.
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