[Du, Yi-Lun;Zhou, Kai;Steinheimer, Jan;Motornenko, Anton;Stoecker, Horst] Frankfurt Inst Adv Studies, Giersch Sci Ctr, D-60438 Frankfurt, Germany.^[Du, Yi-Lun;Motornenko, Anton;Stoecker, Horst] Goethe Univ Frankfurt, Inst Theoret Phys, D-60438 Frankfurt, Germany.^[Du, Yi-Lun;Zong, Hong-Shi] Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China.^[Du, Yi-Lun] Univ Bergen, Dept Phys & Technol, N-5007 Bergen, Norway.^[Pang, Long-Gang;Wang, Xin-Nian] Lawrence Berkeley Natl Lab, Nucl Sci Div, Berkeley, CA 94720 USA.^[Pang, Long-Gang;Wang, Xin-Nian] Univ Calif Berkeley, Phys Dept, Berkeley, CA 94720 USA.^[Pang, Long-Gang;Wang, Xin-Nian] CCNU, Key Lab Quark & Lepton Phys MOE, Wuhan 430079, Peoples R China.^[Zong, Hong-Shi] Nanjing Proton Source Res & Design Ctr, Nanjing 210093, Peoples R China.^[Zong, Hong-Shi] Anhui Normal Univ, Dept Phys, Wuhu 241000, Anhui, Peoples R China.^[Stoecker, Horst] GSI Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany.