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arXiv · 1604.02571

Chiral phase transition and meson spectrum in improved soft-wall AdS/QCD

Zhen Fang·Yue-Liang Wu·Lin Zhang
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Abstract

We investigate in detail the chiral thermal transition of QCD in an improved soft-wall AdS/QCD model with a simply modified 5D conformal mass of the bulk scalar field. We also present a calculation in this model for the light meson spectra and other low-energy characteristic quantities including the pion form factor, the pi-rho coupling constant and the decay constants of pi, rho, a_1, which are shown to result in a good agreement with experimental data except for the pion decay constant. The thermal behavior of chiral condensate is studied. It is found that such a simply improved soft-wall model incorporates the crossover behavior of chiral thermal transition indicated by lattice simulations. The expected chiral transition temperature can be obtained.

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Zhen Fang, Yue-Liang Wu, Lin Zhang. 2016-04-09. Chiral phase transition and meson spectrum in improved soft-wall AdS/QCD. https://doi.org/10.1016/j.physletb.2016.09.009

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