[1] IST NAZL FIS NUCL, I-80125 NAPLES, ITALY
[2] UNIV MICHIGAN, DEPT PHYS, ANN ARBOR, MI 48109 USA
[3] UNIV LECCE, DIPARTIMENTO FIS, I-73100 LECCE, ITALY
[4] IST NAZL FIS NUCL, I-73100 LECCE, ITALY
[5] UNIV AQUILA, DIPARTIMENTO FIS, I-67100 LAQUILA, ITALY
[6] IST NAZL FIS NUCL, I-67100 LAQUILA, ITALY
[7] INDIANA UNIV, DEPT PHYS, BLOOMINGTON, IN 47405 USA
[8] INDIANA UNIV, DEPT ASTRON, BLOOMINGTON, IN 47405 USA
[9] IST NAZL FIS NUCL, LAB NAZL GRAN SASSO, I-67010 ASSERGI, LAQUILA, ITALY
[10] IST NAZL FIS NUCL, LAB NAZL FRASCATI, I-00044 FRASCATI, ROMA, ITALY
[11] DREXEL UNIV, DEPT PHYS, PHILADELPHIA, PA 19104 USA
[12] CALTECH, PASADENA, CA 91125 USA
[13] BOSTON UNIV, DEPT PHYS, BOSTON, MA 02215 USA
[14] UNIV BOLOGNA, DIPARTIMENTO FIS, I-40126 BOLOGNA, ITALY
[15] IST NAZL FIS NUCL, I-40126 BOLOGNA, ITALY
[16] UNIV BARI, DIPARTIMENTO FIS, I-70126 BARI, ITALY
[17] IST NAZL FIS NUCL, I-70126 BARI, ITALY
[18] IST NAZL FIS NUCL, I-56010 PISA, ITALY
[19] UNIV PISA, DIPARTIMENTO FIS, I-56010 PISA, ITALY
[20] UNIV ROMA LA SAPIENZA, DIPARTIMENTO FIS, I-00185 ROME, ITALY
[21] IST NAZL FIS NUCL, I-00185 ROME, ITALY
[22] TEXAS A&M UNIV, DEPT PHYS, COLLEGE STN, TX 77843 USA
[23] UNIV TURIN, DIPARTIMENTO FIS SPERIMENTALE, I-10125 TURIN, ITALY
[24] IST NAZL FIS NUCL, I-10125 TURIN, ITALY
[25] SANDIA NATL LABS, ALBUQUERQUE, NM 87185 USA
[26] SWARTHMORE COLL, SWARTHMORE, PA 19081 USA
[27] UNIV BASILICATA, I-85100 POTENZA, ITALY
[28] IST NAZL FIS NUCL, I-20133 MILAN, ITALY
[29] CNR, IST TESRE, I-40129 BOLOGNA, ITALY
[30] SCUOLA NORMALE SUPER PISA, I-56010 PISA, ITALY
[31] UNIV MOHAMED I, FAC SCI, OUJDA, MOROCCO
[32] UNIV ROMA TRE, DIPARTIMENTO FIS, ROME, ITALY
[33] UNIV TRIESTE, I-34100 TRIESTE, ITALY
[34] IST NAZL FIS NUCL, I-34100 TRIESTE, ITALY
[35] UNIV ROME, DIPARTIMENTO ENERGET, I-00185 ROME, ITALY
[36] RUSSIAN ACAD SCI, INST NUCL RES, MOSCOW 117312, RUSSIA
[37] INST ATOM PHYS, R-76900 BUCHAREST, ROMANIA