Bulletin of the American Physical Society
6th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
Sunday–Friday, November 26–December 1 2023; Hawaii, the Big Island
Session D04: Minisymposium: Exotic Hadrons I
9:00 AM–11:30 AM,
Wednesday, November 29, 2023
Hilton Waikoloa Village
Room: Kings 2
Chair: Elena Santopinto, INFN-Frascati Rome
Abstract: D04.00003 : String-like confinement model for multi-quark systems applied to fully-charmed tetraquarks*
9:45 AM–10:00 AM
Presenter:
Makoto Oka
(Nishina Center for Accelerator-Based Science, RIKEN)
Authors:
Makoto Oka
(Nishina Center for Accelerator-Based Science, RIKEN)
Guang-Juan Wang
(KEK Theory Center, IPNS, KEK)
Daisuke Jido
(Department of Physics, Tokyo Institute of Technology)
First we extend the color Hilbert space to include a “hidden color” (HC) state, which is mixed with the two-meson states such as J/psi-J/psi. The mixing of the HC state leads to attraction sufficient to form a bound state. We apply a realistic Hamiltonian model with the new color scheme for the fully charmed tetraquark sysytem. The full four-body Schroedinger equation is solved with the use of the Gaussian expansion method and the bound and resonant states are obtained as poles of the scattering amplitude in the complex plane by the use of the complex scaling method. We find a bound state and some resonant states in the J(PC)= 1(+-) and 2(++) channels of the cc c-bar c-bar system. The results are compared with recent experimental data and show advantage and validity of our approach.
*Supported by KAKENHI Nos. JP20F20026, JP20K03959, JP21H00132, JP21K03530, JP22H04917, and JP23K03427.
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