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Holographic stability for non-$q\bar{q}$ candidates
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abstract
In the context of bottom-up AdS/QCD models, we discuss how the configurational entropy can describe heavy non-$q\,\bar{q}$ states. Using the non-quadratic softwall model, introduced to describe non-linear Regge trajectories, we parametrize different multiquark and exotic meson structures to describe $Z_c$, $\psi$, and $Z_b$ states as non-$q\,\bar{q}$ hadrons in terms of stability. We found that $Z_c$ is better described as a hybrid meson with one gluon tube, $\psi$ as hadrocharmonium, and $Z_b$ as hadronic molecule.
Forward citations
Cited by 5 Pith papers
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Heavy Quarkonium Spectrum and Decay Constants from a Neural-Network-Based Holographic Model
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Confining potential in holographic bottom-up QCD from WKB
Starting from the D3/D7 vector meson spectrum, the paper reconstructs a hardwall-like confining potential via WKB inversion, then studies its mass spectrum, deconfinement temperature, and configurational entropy.
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$\lambda$, $\rho$, and $\sigma$ Regge trajectories for the quadruply heavy pentaquark $bb\bar{u}cc$ in the diquark-triquark picture
Regge relations for bbūcc in the diquark-triquark picture give four trajectory series with M∼x^{2/3} or √x behavior plus spin-averaged mass estimates for λ, ρ1, ρ2 and σ excitations.
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Digit anomalies in the hadronic mass spectrum, classical and quantum information entropies, and the dynamical QCD scale
The first digits of PDG hadron masses deviate strongly from Benford's law, and the paper reads the resulting Shannon-entropy deficit as a signature of Lambda_QCD.
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Deformed AdS/QCD, mesonic mass spectra, and DCE: Still a margin for heavier resonances
Heavier meson masses are extrapolated from polynomial fits to entropy values of known resonances, with several matches to unconfirmed PDG states.
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