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

## TL;DR

This paper studies the chiral phase diagram and meson spectra using an improved soft-wall AdS/QCD model with 2+1 flavors, revealing a critical end point consistent with lattice and experimental results.

## Contribution

It introduces a detailed analysis of the chiral phase diagram and meson spectra in an improved soft-wall AdS/QCD model with 2+1 flavors, including effects of chemical potential.

## Key findings

- Existence of a critical end point at (, 145 MeV)
- Model's phase diagram aligns with lattice and experimental data
- Chemical potential influences the thermal transition of chiral condensate

## 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 $\mu-T$ plane. We find that the critical end point linking the crossover transition with the first-order phase transition still exists and locates at $(\mu_B, T_c) \simeq (390 \MeV, 145 \MeV)$, which along with the crossover line are consistent with lattice result and experimental analysis from relativistic heavy ion collisions.