Infrared-improved soft-wall AdS/QCD model for mesons

The European Physical Journal C

Zhen Fang¹  Ling-Xiao Cui¹  Yue-Liang Wu¹ 

[1] State Key Laboratory of Theoretical Physics (SKLTP), Beijing, People’s Republic of China;Kavli Institute for Theoretical Physics China (KITPC), Beijing, People’s Republic of China;Institute of Theoretical Physics, Chinese Academy of Sciences, 100190, Beijing, People’s Republic of China;University of Chinese Academy of Sciences (UCAS), Beijing, People’s Republic of China;

关键词: Conformal Symmetry;    Chiral Symmetry Breaking;    Scalar Meson;    Pion Form Factor;    Dilaton Field;   

DOI  :  10.1140/epjc/s10052-015-3866-y

来源: Springer

【 摘 要 】

We construct and investigate an infrared-improved soft-wall AdS/QCD model for mesons. Both linear confinement and chiral symmetry breaking of low energy QCD are well characterized in such an infrared-improved soft-wall AdS/QCD model. The model enables us to obtain a more consistent numerical prediction for the mass spectra of resonance scalar, pseudoscalar, vector, and axial-vector mesons. In particular, the predicted mass for the lightest ground state scalar meson shows good agreement with the experimental data. The model also provides a remarkable check for the Gell-Mann–Oakes–Renner relation and a sensible result for the space-like pion form factor.

【 授权许可】

CC BY