Physics Department and Center for Exploration of Energy and Matter Indiana University 2401 N Milo B.Sampson Lane Bloomington IN 47408 USA;
Nuclear Science Division Lawrence Berkeley National Laboratory Berkeley CA 94720 USA;
Pupin Lab MS-5202 Department of Physics Columbia University New York NY 10027 USA;
Institute of Particle Physics and Key Laboratory of Quark & Lepton Physics(MOE) Central China Normal University Wuhan 430079 China;