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

By P. Colangelo, F. Fazio, F. Giannuzzi, F. Jugeau, S. Nicotri. 2008

172 citations recorded by the source corpus.

We study light scalar mesons in the holographic QCD soft-wall model with a background dilaton field. The masses and decay constants are compatible with experiment and QCD determinations if a{sub 0}(980) and f{sub 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 derived on the anti-de Sitter side and in 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: we discuss how this discrepancy is related to the description of chiral symmetry breaking in this model, and the possible solutions.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/84ad6bff95028555101d77aeed2adf4ba3df6a6a

Citations in the corpus

• Light-front holographic QCD and emerging confinement (2014, unknown): “Shifman, private communication (3)For a treatment in the soft wall model with negative dilaton profile see [220, 379].”