IR-improved soft-wall AdS/QCD model for baryons

• Main Authors: Zhen Fang, Danning Li, Yue-Liang Wu
• Format: Article
• Language: English
• Published: Elsevier 2016-03-01
• Series: Physics Letters B
• Online Access: http://www.sciencedirect.com/science/article/pii/S0370269316000629

We construct an infrared-improved soft-wall AdS/QCD model for baryons by considering the infrared-modified 5D conformal mass and Yukawa coupling of the bulk baryon field. The model is also built by taking into account the parity-doublet pattern for the excited baryons. When taking the bulk vacuum structure of the meson field to be the one obtained consistently in the infrared-improved soft-wall AdS/QCD model for mesons, we arrive at a consistent prediction for the baryon mass spectrum in even and odd parity. The prediction shows a remarkable agreement with the experimental data. We also perform a calculation for the ρ(a1) meson–nucleon coupling constant and obtain consistent result in comparison with the experimental data and other effective models.