Hi kerstin, > I have a question concerning how you find eps phsp: Is it based on signal > MC (and if yes, on which) or does something else enter? in this case, i mean 0.64 +- 0.002 , it has been calculated at generator level running a kumac on DFN model (ntuples have been produced by riccardo). I did the same for cleo...obtaining 0.689026 +- 0.00207103 and for belle " 0.460618 +-0.00222579 you can find ntuples at DFN: /nfs/farm/babar/AWG/ISL/users/rfaccini/incl_def_123232.hbook CLEO: /nfs/farm/babar/AWG/ISL/users/rfaccini/incl_1_1421422.hbook BELLE: /nfs/farm/babar/AWG/ISL/HFAGsum04/belle_0.hbook cheers virginia