Abstract
By matching the predictions of the Dp–Dq soft-wall model in type II superstring theory with the spectra of vector and axial-vector mesons, we show the dependence of the Regge trajectories parameters on the metric parameters of the model. From the experimental results of Regge parameters for vector mesons, it is found that the D3 background brane with both q=5 and q=7 probe brane and D4 background brane with q=4 probe brane are close to the realistic holographic QCD. We also discuss how to realize chiral symmetry breaking in the vacuum and asymptotic chiral symmetry restoration in high excitation states. We find that the constant component of the 5-dimension mass square of axial-vector mesons plays an efficient role to realize the chiral symmetry breaking, and a small negative z 4 correction in the 5-dimension mass square is helpful to realize the chiral symmetry restoration in high excitation states.
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He, S., Huang, M., Yan, QS. et al. Confront holographic QCD with Regge trajectories of vectors and axial-vectors. Eur. Phys. J. C 66, 187–196 (2010). https://doi.org/10.1140/epjc/s10052-010-1239-0
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DOI: https://doi.org/10.1140/epjc/s10052-010-1239-0