Di-$J/\psi$ structures from the quark Pauli-blocking effect

Sachiko Takeuchi, Atsushi Hosaka, Makoto Takizawa +1

The double-charmonium scattering states such as $J/\psi J/\psi$, ${\eta }_{c}J/\psi$, and ${\eta }_c{\eta }_c$ are investigated by a simplified quark cluster model. It is found that the quark Pauli-principle ov…