Previous CERES results
Enhancement (0.25 <mee<0.7 GeV/c2):   2.6 ± 0.5 (stat.) ± 0.6 (syst.) (96’ data set)
                                                                 3.9 ± 0.9 (stat.) ± 0.9 (syst.)  (95’ data set)
Kirill Filimonov, INPC 2001