1 FAIR GmbH: Facility for Antiproton and Ion Research in Europe GmbH, Planckstrae 1, 64291 Darmstadt, Germany
2 National Research Nuclear University MEPhI, Moscow, Russia National Research Nuclear University MEPhI, Kashirskoe shosse, 31, 115409 Moscow, Russia
3 Institut fu¨r Kernphysik, Technische Universit€at Darmstadt, Schlossgartenstrasse 9, 64289 Darmstadt, Germany
4 Institute of Modern Physics, CAS, Lanzhou 730000, PR China
5 State Scientific Center Russian Federation e Institute for Theoretical and Experimental Physics of National Research Center “Kurchatov Institute” (SSC RF ITEP of NRC “Kurchatov Institute”), FSBI SSC RF ITEP, Bolshaya Cheremushkinskaya, 25, 117218 Moscow, Russia
6 School of Science, Xi'an Jiaotong University and Institute of Modern Physics, CAS, Xianning West Road 28#, Xi'an 710049, PR China