Affiliation: | Key Laboratory of Particle and Radiation Imaging (Ministry of Education), Tsinghua University, Beijing 100084 Department of Engineering Physics, Tsinghua University, Beijing 100084 Center for High Energy Physics, Tsinghua University, Beijing 100084 Laboratoire de l'Accélérateur Linéaire, Université Paris-Sud 11, CNRS/IN2P3 (UMR 8607), 91400 Orsay, France |