[1] Univ South Carolina, Dept Phys & Astron, Columbia, SC 29208 USA
[2] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA
[3] Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Padua, Italy
[4] Ist Nazl Fis Nucl, Sez Bologna, I-40127 Bologna, Italy
[5] Sapienza Univ Roma, Dipartimento Fis, I-00185 Rome, Italy
[6] Ist Nazl Fis Nucl, Sez Roma, I-00185 Rome, Italy
[7] Ist Nazl Fis Nucl, Lab Nazl Gran Sasso, I-67100 Laquila, Italy
[8] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA
[9] Ist Nazl Fis Nucl, Sez Milano Bicocca, I-20126 Milan, Italy
[10] Univ Milano Bicocca, Dipartimento Fis, I-20126 Milan, Italy
[11] Virginia Polytech Inst & State Univ, Ctr Neutrino Phys, Blacksburg, VA 24061 USA
[12] Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy
[13] Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy
[14] MIT, Cambridge, MA 02139 USA
[15] Fudan Univ, Inst Modern Phys, Key Lab Nucl Phys & Ion Beam Applicat, MOE, Shanghai 200433, Peoples R China
[16] Lawrence Berkeley Natl Lab, Nucl Sci Div, Berkeley, CA 94720 USA
[17] Gran Sasso Sci Inst, I-67100 Laquila, Italy
[18] Alma Mater Studiorum Univ Bologna, Dipartimento Fis & Astron, I-40127 Bologna, Italy
[19] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Rome, Italy
[20] Univ Paris Saclay, IJCLab, CNRS IN2P3, F-91405 Orsay, France
[21] Calif Polytech State Univ San Luis Obispo, Phys Dept, San Luis Obispo, CA 93407 USA
[22] Shanghai Jiao Tong Univ, INPAC, Shanghai Lab Particle Phys & Cosmol, Shanghai 200240, Peoples R China
[23] Shanghai Jiao Tong Univ, Sch Phys & Astron, Shanghai Lab Particle Phys & Cosmol, Shanghai 200240, Peoples R China
[24] Yale Univ, Dept Phys, Wright Lab, New Haven, CT 06520 USA
[25] Johns Hopkins Univ, Dept Phys & Astron, 3400 North Charles St, Baltimore, MD 21211 USA
[26] Univ Paris Saclay, IRFU, CEA, F-91191 Gif Sur Yvette, France
[27] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA
[28] Univ Calif Berkeley, Dept Nucl Engn, Berkeley, CA 94720 USA
[29] Univ Cassino & Lazio Merid, Dipartimento Ingn Civile & Meccan, I-03043 Cassino, Italy
[30] Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy
[31] Lawrence Berkeley Natl Lab, Engn Div, Berkeley, CA 94720 USA