# 19th International Conference on Hadron Spectroscopy and Structure in memoriam Simon Eidelman

26-31 July 2021
Mexico City
Mexico/General timezone
HADRON 2021 is over. Thanks for making it a success!
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## Place

Location: Mexico City
Date: 30 Jul 09:45 - 10:45

## Conveners

• Dr. Pilloni, Alessandro (Università di Messina)

## Timetable | Contribution List

Displaying 3 contributions out of 3
Type: Parallel Session: Exotic hadrons and candidates-7
We systematically calculate the mass spectrum of the higher excited fully-charmed tetraquark $cc\bar c\bar c$ states including the S-wave radial excitations and the P-wave states with a nonrelativistic quark model. The recently observed $X(6900)$ state may be the candidate of the first radially excited tetraquarks with $J^{PC}=0^{++}$ or $2^{++}$, or the $1^{+-}$ or $2^{-+}$ P-wave states b ... More
Partial wave analysis is performed, with effective potentials as dynamical inputs, to scrutinize the recent LHCb data on the di-$J/\psi$ invariant mass spectrum. Coupled-channel effects are incorporated in the production amplitude via final state interactions. The LHCb data can be well described. A dynamically generated pole structure, which can be identified as the $X(6900)$ state, is found. Our ... More
The mass of tetraquark states of all $qq\bar q\bar q$, $qc\bar q \bar c$, and $cc\bar c \bar c$ quark configurations are evaluated in a constituent quark model, where the Cornell-like potential and one-gluon exchange spin-spin coupling are employed. Three mass-dependent coupling parameters are proposed, and all model parameters are predetermined by comparing the theoretical and experimental masses ... More