Hidden-flavour four-quark states in the charm and bottom region

Abstract

We discuss the spectrum and the internal composition of ground and excited four-quark states in the charm and bottom energy region. To this end we extend previous calculations within the framework of the relativistic four-body Faddeev-Yakubovsky equation to include quantum numbers with $J^{PC}=0^{++},0^{-+},1^{--},1^{+-}$ and $1^{++}$ and study their internal composition in terms of heavy-light meson pairs, hadroquarkonia and diquark-antidiquark clusters. We observe similar patterns in the charm and bottom energy region with different compositions of the four-quark states depending on $J^{PC}$ quantum numbers. Most notably, we find that all states with $C\cdot P=+1$ are dominated by heavy-light meson contributions, whereas for axialvector states with $J^{PC}=1^{+-}$ including the $Z_c(3900)$ we find a much more complicated picture depending on the flavour content. We systematically compare our results for the spectrum with existing experimental results and provide predictions for future analyses.

arXiv comment14 pages, 11 figures

References in corpus (47)

• Observation of a New Narrow Charmonium State in Exclusive B+-->K+ pi+pi- J/psi Decays
• Observation of a narrow charmonium-like state in exclusive B+ -> K+ pi+pi- J/psi decays
• Hadronic molecules
• The hidden-charm pentaquark and tetraquark states
• The $XYZ$ states: experimental and theoretical status and perspectives
• Multiquark Resonances
• Non-Standard Heavy Mesons and Baryons, an Experimental Review
• Pentaquark and Tetraquark states
• Heavy-Quark QCD Exotica
• Exotics: Heavy Pentaquarks and Tetraquarks
• pi- and K-meson Bethe-Salpeter Amplitudes
• Bethe-Salpeter Study of Vector Meson Masses and Decay Constants
• Charmonium
• Baryons as relativistic three-quark bound states
• From controversy to precision on the sigma meson: a review on the status of the non-ordinary $f_0(500)$ resonance
• Observation of a charged (DD*bar)- mass peak in e+e- --> pi+ (DD*bar)- at Ecm=4.26 GeV
• Lattice Prediction for Deeply Bound Doubly Heavy Tetraquarks
• Fate of the Tetraquark Candidate Zc(3900) from Lattice QCD
• Evidence for charm-bottom tetraquarks and the mass dependence of heavy-light tetraquark states from lattice QCD
• Evidence that the Y(4660) is a f_0(980)psi' bound state
• Tetraquark bound states in a Bethe-Salpeter approach
• X(3872) and Y(4140) using diquark-antidiquark operators with lattice QCD
• Lattice study of light scalar tetraquarks with I=0,2,1/2,3/2: are sigma and kappa tetraquarks?
• Employing spin symmetry to disentangle different models for the XYZ states
• The light scalar mesons as tetraquarks
• Four-point functions and the permutation group S4
• Exotic resonances of fully-heavy tetraquarks in a lattice-QCD insipired quark model
• Scattering amplitudes and contour deformations
• Observation of a resonant structure near the $D_s^{+}{D}_s^{-}$ threshold in the $B^{+}\to D_s^{+}{D}_s^{-}{K}^{+}$ decay
• The Tetraquark Candidate Zc(3900) from Dynamical Lattice QCD Simulations
• Spin partners $W_{bJ}$ from the line shapes of the $Z_b(10610)$ and $Z_b(10650)$
• Four-quark states from functional methods
• Vector mesons as dynamical resonances in the Bethe-Salpeter framework
• Four-quark states with charm quarks in a two-body Bethe-Salpeter approach
• Exotic double-charm molecular states with hidden or open strangeness and around $4.5\sim 4.7$ GeV
• $X(3872)$ as a four-quark state in a Dyson-Schwinger/Bethe-Salpeter approach
• Investigation of the stability for fully-heavy $bc\bar{b}\bar{c}$ tetraquark states
• Bethe-Salpeter studies of mesons beyond rainbow-ladder
• Study of $I=0$ bottomonium bound states and resonances in $S$, $P$, $D$ and $F$ waves with lattice QCD static-static-light-light potentials
• The light scalars: four- vs. two-quark states in the complex energy plane from Bethe-Salpeter equations
• Disentangling different structures in heavy-light four-quark states
• Heavy baryon spectroscopy in a quark-diquark approach
• $Y(4626)$ as a $P$-wave $[cs][\bar{c}\bar{s}]$ tetraquark state
• Unified tetraquark equations
• The $Y(4230)$ as a $D_1\bar{D}$ molecule
• Rotation and vibration in tetraquarks
• Theory of hadronic molecules applied to the XYZ states

Cited by in corpus (6)

• Structure of open-flavour four-quark states in the charm and bottom region
• $\lambda$ and $\rho$ Regge trajectories for hidden bottom and charm tetraquarks $(Qq)(\bar{Q}{\bar{q}}^{\prime })$
• Charmoniumlike Channels $1^{+}$ with Isospin $1$ from Lattice and Effective Field Theory
• Hadronic molecules and multiquark states
• Baryonic form factors of light pseudoscalar mesons
• Getting a handle on correlation functions