Stability of hexaquarks in the string limit of confinement

Abstract

The stability of systems containing six quarks or antiquarks is studied within a simple string model inspired by the strong-coupling regime of quantum chromodynamics and used previously for tetraquarks and pentaquarks. We discuss both six-quark $(q^6)$ and three-quark--three-antiquark $(q^3\bar{q}{}^3)$ states. The quarks are assumed to be distinguishable and thus not submitted to antisymmetrization. It is found that the ground state of $(q^6)$ is stable against dissociation into two isolated baryons. For the case of $(q^3\bar{q}{}^3)$, our results indicate the existence of a bound state very close to the threshold. The investigations are extended to $(q^3{Q}^3)$ and $(Q^3{\bar{q}}^3)$ systems with two different constituent masses, and their stability is discussed as a function of the mass ratio.

7pages, 7 figures

References in corpus (10)

• Bound H-dibaryon in Flavor SU(3) Limit of Lattice QCD
• Evidence for a Bound H-dibaryon from Lattice QCD
• Double-Pionic Fusion of Nuclear Systems and the ABCEffect -- Aproaching a Puzzle by Exclusive and Kinematically Complete Measurements
• New Hadron States
• Exotic meson-meson molecules and compact four--quark states
• Stability of multiquarks in a simple string model
• Two-Pion Production in Proton-Proton Collisions -- Experimental Total Cross Sections and their Isospin Decomposition
• Observation of an ABC effect in proton-proton collisions
• Quantum chromodynamics quark benzene
• Lattice QCD Study for Confinement in Hadrons

Cited by in corpus (25)

• Exotic hadrons: review and perspectives
• Towards the understanding of fully-heavy tetraquark states from various models
• Very heavy flavored dibaryons
• Tetraquarks in large-$N_c$ QCD
• Baryonia and near-threshold enhancements
• Search for doubly-heavy dibaryons in a quark model
• X(1835), X(2120) and X(2370) in a flux tube model
• Can the state $Y(4626)$ be a $P$-wave tetraquark state $[cs][\bar{c}\bar{s}]$?
• Adiabaticity and color mixing in tetraquark spectroscopy
• Heavy-baryon quark model picture from lattice QCD
• A prediction of $D^{\ast }$-multi-$\rho$ states
• The interplay between compact and molecular structures in tetraquarks
• Cluster reducibility of multiquark operators
• $T_{bbb}$: a three $B-$meson bound state
• Fragmentation of fully heavy tetraquarks: The TQ4Q1.1 functions as a case study
• Doubly charmed dibaryon states
• Stability of multiquarks in an improved flip-flop model of confinement
• Investigation of ${\Delta }^0{\Delta }^0$ dibaryon in QCD
• An introduction to the quark model
• Tetraquark-Jet Systems at the High-Luminosity LHC
• All-charm tetraquarks at hadron colliders: A high-precision fragmentation perspective
• Multimodal Fragmentation of All-Heavy Pentaquarks: Uncertainty-Aware Predictions for Hadron Colliders
• Decay coupling constants sum rules for dibaryon octet into two baryon octets with ${\lambda }_8$ first order SU(3) symmetry breaking
• The Role of Flavor in Multiquark Spectroscopy
• Heavy-flavor multimodal fragmentation to $S$-wave pentacharms at next-generation hadron colliders