School of Physics and State Key Laboratory of Nuclear Physics and Technology Peking University Beijing 100871 China;
Institut de Physique Nucléaire IN2P3-CNRS and Université Paris-Sud F-91406 Orsay France;
Institute of Theoretical Physics Chinese Academy of Sciences Beijing China;
Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator Lanzhou 730000 China;
Department of Physics University of Stellenbosch Stellenbosch South Africa;