[1] Inst High Energy Phys, Beijing 100049, Peoples R China
[2] Beihang Univ, Beijing 100191, Peoples R China
[3] Beijing Inst Petrochem Technol, Beijing 102617, Peoples R China
[4] Bochum Ruhr Univ, D-44780 Bochum, Germany
[5] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA
[6] Cent China Normal Univ, Wuhan 430079, Peoples R China
[7] Cent South Univ, Changsha 410083, Peoples R China
[8] China Ctr Adv Sci & Technol, Beijing 100190, Peoples R China
[9] China Univ Geosci, Wuhan 430074, Peoples R China
[10] Chung Ang Univ, Seoul 06974, South Korea
[11] COMSATS Univ Islamabad, Lahore Campus,Def Rd,Off Raiwind Rd, Lahore 54000, Pakistan
[12] Fudan Univ, Shanghai 200433, Peoples R China
[13] GI Budker Inst Nucl Phys SB RAS BINP, Novosibirsk 630090, Russia
[14] GSI Helmholtzctr Heavy Ion Res GmbH, D-64291 Darmstadt, Germany
[15] Guangxi Normal Univ, Guilin 541004, Peoples R China
[16] Guangxi Univ, Nanning 530004, Peoples R China
[17] Hangzhou Normal Univ, Hangzhou 310036, Peoples R China
[18] Hebei Univ, Baoding 071002, Peoples R China
[19] Helmholtz Inst Mainz, Staudinger Weg 18, D-55099 Mainz, Germany
[20] Henan Normal Univ, Xinxiang 453007, Henan, Peoples R China
[21] Henan Univ Sci & Technol, Luoyang 471003, Peoples R China
[22] Henan Univ Technol, Zhengzhou 450001, Peoples R China
[23] Huangshan Coll, Huangshan 245000, Peoples R China
[24] Hunan Normal Univ, Changsha 410081, Peoples R China
[25] Hunan Univ, Changsha 410082, Peoples R China
[26] Indian Inst Technol Madras, Chennai 600036, Tamil Nadu, India
[27] Indiana Univ, Bloomington, IN 47405 USA
[28] INFN Lab Naz Frascati, I-00044 Frascati, Italy
[29] INFN Sez Perugia, INFN Lab Naz Frascati, I-06100 Perugia, Italy
[30] Univ Perugia, INFN Lab Naz Frascati, I-06100 Perugia, Italy
[31] INFN Sez Ferrara, I-44122 Ferrara, Italy
[32] Univ Ferrara, INFN Sez Ferrara, I-44122 Ferrara, Italy
[33] Inst Modern Phys, Lanzhou 730000, Peoples R China
[34] Inst Phys & Technol, Peace Ave 54B, Ulaanbaatar 13330, Mongolia
[35] Univ Tarapaca, Inst Alta Invest, Casilla 7D, Arica, Chile
[36] Jilin Univ, Changchun 130012, Peoples R China
[37] Johannes Gutenberg Univ Mainz, Johann Joachim Becher Weg 45, D-55099 Mainz, Germany
[38] Joint Inst Nucl Res, Dubna 141980, Moscow Region, Russia
[39] Justus Liebig Univ Giessen, Phys Inst 2, Heinrich Buff Ring 16, D-35392 Giessen, Germany
[40] Lanzhou Univ, Lanzhou 730000, Peoples R China
[41] Liaoning Normal Univ, Dalian 116029, Peoples R China
[42] Liaoning Univ, Shenyang 110036, Peoples R China
[43] Nanjing Normal Univ, Nanjing 210023, Peoples R China
[44] Nanjing Univ, Nanjing 210093, Peoples R China
[45] Nankai Univ, Tianjin 300071, Peoples R China
[46] Natl Ctr Nucl Res, PL-02093 Warsaw, Poland
[47] North China Elect Power Univ, Beijing 102206, Peoples R China
[48] Peking Univ, Beijing 100871, Peoples R China
[49] Qufu Normal Univ, Qufu 273165, Shandong, Peoples R China
[50] Shandong Normal Univ, Jinan 250014, Peoples R China