Hi, our partial BF's for mX and Pplus are much too high. Maybe Roberto and/or Concezio can give comments to the following: To cross check Kerstin and I have compared the current mX-q^2 numbers with what has been obtained for EPS05 (BAD1214) and in BAD913. There are several puzzles to us which point to the source of the problem in the efficiency calculation: Now EPS05 BAD913 eps^u_sel 0.439 0.334 ? eps^u_kin 0.90 0.955 ? eps^u_sel*eps^u_kin 0.39 0.32 ? pstar 1.14 1.204* 1/1.27 where pstar=(eps^u_t eps^u_l)/(eps^sl_t eps^sl_l) *: only (eps^u_l)/(eps^sl_l)) given 1) Why is there so a large difference in eps^u_sel*eps^u_kin? 2) Why is there so a alrge difference between BAD913 and now? 3) In addition, the pstar factor for the mX analysis is 0.72. Why is there such a large difference compared to 1.14? BAD1214 P.31 suggests that there should not be a large difference. One should keep in mind that eps^u_l, eps^u_t, eps^u_sel, eps^u_kin are only for the signal region. Cheers, Heiko and Kerstin