1. School of Physics, Peking University, Beijing 100871, China
2. Department of Physics, University of Stellenbosch, Stellenbosch, South Africa
3. Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080, China
4. Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000, China
5. Department of Space Science and Applied Physics, Shandong University at Weihai, Weihai 264209, China