HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS is a science periodical focusing on specialized fields with its first issue published in 1977.It is sponsored by the Chinese Physical Society,and supported by the Institute of High Energy Physics and the Institute of Modern Physics,the Chinese Academy of Sciences.It is a monthly journal,distributed both at home and abroad. This journal publishes research papers on theories,experiments and applications in particle physics,nuclear and heavy ion physics,astrophysics and cosmology related to particles and nuclei,detectors and exprimental