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机译:
Inst Nazl Fis Nucl, Sez Catania, Via Santa Sofia 64, I-95123 Catania, Italy;
Univ Autonoma Madrid, Dept Fis Teor Modulo 15, E-28049 Madrid, Spain;
CNRS, UMR8608, Inst Phys Nucl, F-91406 Orsay, FranceUniv Barcelona, Fac Fis, Dept Estruct & Constituents Mat, Diagonal 647, E-08028 Barcelona, Spain;