Finite temperature effect in infrared-improved AdS/QCD model with back reaction of bulk vacuum  

作　　者：崔凌逍 房震 吴岳良 

机构地区：[1]Key Laboratory of Theoretical Physics(SKLTP),Beijing 100190,China [2]Kavli Institute for Theoretical Physics China(KITPC),Beijing 100190,China [3]Institute of Theoretical Physics,Chinese Academy of Sciences,Beijing 10090,China [4]University of Chinese Academy of Sciences(UCAS),Beijing 100049,China

出　　处：《Chinese Physics C》2016年第6期15-22,共8页中国物理C（英文版）

基　　金：Supported by National Nature Science Foundation of China(NSFC)(10975170,10905084,10821504);Project of Knowledge Innovation Program(PKIP)of Chinese Academy of Science

摘　　要：Based on an IR-improved soft-wall AdS/QCD model for mesons, which provides a consistent prediction for the mass spectra of resonance scalar, pseudoscalar, vector and axial-vector mesons, we investigate its finite temperature effect. By analyzing the spectral function of mesons and fitting it with a Breit-Wigner form, we perform an analysis for the critical temperature of mesons. The back-reaction effects of bulk vacuum are considered and the thermal mass spectral function of resonance mesons is calculated based on the back-reaction improved action. A reasonable melting temperature is found to be Tc ≈150 ± 7 MeV, which is consistent with the recent results from lattice QCD simulations.Based on an IR-improved soft-wall AdS/QCD model for mesons, which provides a consistent prediction for the mass spectra of resonance scalar, pseudoscalar, vector and axial-vector mesons, we investigate its finite temperature effect. By analyzing the spectral function of mesons and fitting it with a Breit-Wigner form, we perform an analysis for the critical temperature of mesons. The back-reaction effects of bulk vacuum are considered and the thermal mass spectral function of resonance mesons is calculated based on the back-reaction improved action. A reasonable melting temperature is found to be Tc ≈150 ± 7 MeV, which is consistent with the recent results from lattice QCD simulations.

关 键 词：AdS/QCD finite temperature mass spectrum spectral function BACK-REACTION 

分 类 号：O572.33[理学—粒子物理与原子核物理]