Abstract
Using a relativized diquark model Hamiltonian, we calculate the masses of J^{PC}=0^{++} ground-state tetraquarks in the following systems: b s {bar{b}} {bar{s}}, bb {bar{n}} {bar{n}} (n=u, d), bb {bar{s}} {bar{s}}, cc{bar{c}} {bar{c}}, b b {bar{b}} {bar{b}}, b c{bar{b}} {bar{c}} and b b {bar{c}} {bar{c}}. We also compute extensive spectra for the fully-heavy quark flavour combinations. Finally, as a test of the diquark model approach, we compute the masses of fully-heavy baryons in the diquark model. Our results may be compared soon to the forthcoming experimental data for fully-heavy three-quark systems.
Highlights
Possible existence of baryon–antibaryon mesons [8]
Using a relativized diquark model Hamiltonian, we calculate the masses of J PC = 0++ ground-state tetraquarks in the following systems: bsbs, bbnn (n = u, d), bbss, cccc, bbbb, bcbcand bbcc
We compute the spectra of cccc, ccbb, ccbb ∼ ccbb, bbbbtetraquarks from the diquark+antidiquark perspective, using a potential model characterised by linear confinement and one-gluon exchange
Summary
A large amount of data, obtained at both e+e− and hadron colliders, has provided evidence for the possible existence of such exotic hadrons. Some tetraquark candidates cannot be described using typical constituent quark models [13,14,15,16,17,18,19,20,21,22] because they carry electric charge; cannot be qqsystems They are good candidates for: hidden-charm/bottom tetraquarks [5,9,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41],or molecular systems constituted from a pair of charm/bottom mesons [42,43,44,45,46,47]; or hadro-charmonia [48,49,50,51]. Our results may be compared soon to the forthcoming experimental data for fully-heavy baryons
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