DIS2022: XXIX International Workshop on Deep-Inelastic Scattering and Related Subjects

All-charm tetraquark in Front Form dynamics

Not scheduled

20m

Posters WG4: QCD with Heavy Flavours and Hadronic Final States WG4: QCD with Heavy Flavours and Hadronic Final States

Speaker

Kamil Serafin (Institute of Modern Physics CAS)

Description

We present results of all-charm tetraquark study in the Front Form of Hamiltonian dynamics using many-body basis function approach known as Basis Light Front Quantization. We take into account only color-singlet states but make no restriction on possible tetraquark structures. The model Hamiltonian contains transverse and longitudinal confining potentials and one-gluon-exchange effective potential. We calculate tetraquark ground state mass as well as two-body and four-body estimates of meson-meson breakup threshold. The results suggest an unbound all-charm tetraquark. Free parameters (charm quark mass, confining strength, and strong coupling constant) are fitted to the first eight states in the charmonium spectrum.