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Light scalar mesons in the soft-wall model of AdS/QCD

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arxiv 0807.1054 v1 pith:UR56NJJ3 submitted 2008-07-07 hep-ph

P. Colangelo , F. De Fazio , F. Giannuzzi , F. Jugeau , S. Nicotri This is my paper · ORCID
classification hep-ph
keywords mesonsscalarlightmodelexperimentsoft-wallstatesbackground
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abstract

We study light scalar mesons in the AdS/QCD soft-wall model with a background dilaton field. The masses and decay constants are compatible with experiment and QCD determinations if $a_0(980)$ and $f_0(980)$ are identified as the lightest scalar mesons; moreover, the states are organized in linear Regge trajectories with the same slope of vector mesons. Comparing the two-point correlation function of scalar operators in AdS and QCD, information about the condensates can be derived. Strong couplings of scalar states to pairs of light pseudoscalar mesons turn out to be small, at odds with experiment and QCD estimates: this discrepancy is related to the description of chiral symmetry breaking in this model.

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Cited by 6 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Quantization Rules in Holographic QCD Models

    hep-ph 2025-05 conditional novelty 6.0 of 10

    A generalized WKB/Bohr-Sommerfeld quantization rule is derived for holographic QCD potentials with an infinite boundary barrier and applied to scalar and vector fields in the soft-wall model, matching shooting-method ...

  2. Heavy Quarkonium Spectrum and Decay Constants from a Neural-Network-Based Holographic Model

    hep-ph 2026-01 conditional novelty 5.0 of 10

    A neural-network-parametrized dilaton field reproduces the masses and leptonic decay constants of charmonium and bottomonium with 1.26% and 3.32% RMS errors, but only because those values were used as training data.

  3. Thermodynamics of the Isospectral family of holographic vector mesons

    hep-ph 2026-05 unverdicted novelty 4.0 of 10

    Isospectral transformations in softwall AdS/QCD allow tuning the rho meson's decay constant to its experimental value of 226 MeV, producing a predicted melting temperature of 157 MeV from spectral function computation...

  4. Holographic information measures for spin-$3/2$ $\Delta$ baryons in AdS/QCD

    hep-th 2026-02 unverdicted novelty 4.0 of 10

    Holographic AdS/QCD calculations of configurational entropy and complexity for Delta baryons yield Regge trajectories that organize known masses and predict additional resonances.

  5. Mechanical properties of the proton from a deformed AdS holographic model

    hep-ph 2025-11 conditional novelty 4.0 of 10

    A deformed AdS holographic model with a Dirac proton computes the gluon gravitational form factor A in good agreement with lattice QCD after normalizing the zero point, but the D-term and derived pressure/shear distri...

  6. Deformed AdS/QCD, mesonic mass spectra, and DCE: Still a margin for heavier resonances

    hep-ph 2024-12 reject novelty 4.0 of 10

    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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