作者机构:[1]College of Physics, Shenzhen University, Shenzhen 518060, China, [2]Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China, [3]Center of Theoretical Nuclear Physics, National Laboratory of Heavy ion Accelerator, Lanzhou 730000, [4]Institut fur Theoretische Physik,Justus-Liebig-Universitat, D-35392, Giessen, Germany
相关基金:Supported by National Natural Science Foundation of China (10975100, 11011130216, 10979024, 10705014) and the financial support from DFG of Germany and Major State Basic Research Development Progrom of China (2007CB81500). The authors (Wang N, Zhou S G and Zhao E G) acknowledge the warm hospitality of the Institut fur Theoretisehe Physik, Universitat Giessen, Gemany. They are also grateful to Prof. R. V. Jolos and Prof. Li J Q for valuable discussions.