Masses of the ground and excited (1P, 2S, 1D, 2P, 3S) states fully heavy tetraquarks, composed charm (c) bottom (b) quarks antiquarks, are calculated in diquark–antidiquark picture within relativistic quark model based on quasipotential approach quantum chromodynamics. The quasipotentials quark–quark interactions constructed similarly to previous consideration mesons baryons. Relativistic effec...

The magnetic moments of the vector hidden-charmed tetraquark states that have been observed, and can be expected to observed experimentally, determined using light-cone sum rules taking into account diquark-antidiquark structure with quantum numbers ${J}^{PC}={1}^{\ensuremath{-}\ensuremath{-}}$ ${J}^{PC}={1}^{\ensuremath{-}+}$. Since these are considered different flavors light quarks, they non...

Recently a novel hadronic state of mass 6.9 GeV, that decays mainly to pair charmonia, was observed in LHCb. The data also reveals broader structure centered around 6490 MeV and suggests another unconfirmed resonance at 7240 MeV, very near the threshold two doubly charmed $\Xi_{cc}$ baryons. We argue this note these exotic hadrons are genuine tetraquarks not molecules charmonia. It is conjectur...

Motivated by the observation of exotic structure around 6900MeV in $J/\psi$-pair mass spectrum using proton-proton collision data LHCb collaboration, we study spectra fully-heavy tetraquarks within Bethe-Salpeter equation and Regge trajectory relation. The $X(6900)$ may be explained as a radially excited state with quark content $cc\bar{c}\bar{c}$ spin-parity $0^{++}(3S)$ or $2^{++}(3S)$ an orb...

We calculate the masses of $QQ\bar{q}\bar{q}$ ($Q=c,b$; $q=u,d,s$) tetraquark states with aid heavy diquark-antiquark symmetry (HDAS) and chromomagnetic interaction (CMI) model. The highest-spin ($J=2$) tetraquarks that have only $(QQ)_{\bar{3}_c}(\bar{q}\bar{q})_{3_c}$ color structure are related those conventional hadrons using HDAS. Thereafter, their partner determined mass splittings in CMI...