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arXiv · 1904.04695

Octet meson spectra and chiral phase diagram in the improved soft-wall AdS/QCD model

Zhen Fang·Yue-Liang Wu·Lin Zhang
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Abstract

We give a further study on chiral phase diagram in the improved soft-wall AdS/QCD model with $2+1$ flavors. The equations of motion for the octet pseudoscalar, vector and axial-vector mesons are derived to compute the octet meson spectra and relevant decay constants, by which the model parameters are determined. The chemical potential effects on thermal transition of chiral condensate are investigated, which enables us to obtain the chiral phase diagram in the $μ-T$ plane. We find that the critical end point linking the crossover transition with the first-order phase transition still exists and locates at $(μ_B, T_c) \simeq (390 \MeV, 145 \MeV)$, which along with the crossover line are consistent with lattice result and experimental analysis from relativistic heavy ion collisions.

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Zhen Fang, Yue-Liang Wu, Lin Zhang. 2019-09-07. Octet meson spectra and chiral phase diagram in the improved soft-wall AdS/QCD model. https://doi.org/10.1103/physrevd.100.054008

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