[1] Gifu Univ, Dept Phys, Gifu 5011193, Japan
[2] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan
[3] Osaka Univ, Dept Phys, Toyonaka, Osaka 5600043, Japan
[4] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan
[5] Brookhaven Natl Lab, Upton, NY 11973 USA
[6] GSI Darmstadt, D-64291 Darmstadt, Germany
[7] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA
[8] Univ Freiburg, Dept Phys, D-79104 Freiburg, Germany
[9] KEK, Inst Particle & Nucl Studies, Tsukuba, Ibaraki 3050801, Japan
[10] Hampton Univ, Dept Phys, Hampton, VA 23668 USA
[11] RIKEN, Wako, Saitama 3510198, Japan
[12] CIAE, Dept Phys, Beijing 102413, Peoples R China