Absorption Cross Section and Decay Rate of Stationary Axisymmetric Einstein-Maxwell Dilaton Axion Black Hole

作     者：刘长青 

作者机构：Department of Physics and Information Engineering Hunan Institute of Humanities Science and Technology Loudi 417000 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2010年第27卷第4期

页      面：49-52页

核心收录：

学科分类：070207[理学-光学] 07[理学] 070201[理学-理论物理] 0702[理学-物理学] 

基　　金：Supported by the National Natural Science Foundation of China under Grant No 10947101  and the Scientific Research Fund of Hunan Provincial Education Department under Grant No 08C464 

主　　题：Restricted feeding Biodeterioration Rations Crossing over Absorption 

摘      要：The low energy absorption cross section and the decay rate of the stationary Axisymmetric Einstein-Maxwell Dilaton Axion black hole for massless scalar particles is calculated analytically. It is shown that the partial absorption cross section increases as the rotating parameter a and the absolute value of the dilaton D decreases. It is also shown that the partial absorption cross section is not always positive due to superradianee factor ω - mΩ. However, the decay rate of this black hole is always positive.