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Hi, > > 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 Thanks, Virginia! So comparing this number with what we find on the unfolded mX spectrum only tests how well our unfolded spectrum agrees with the signal MC. My impression on Thursday was that we wanted to compare the numbers to see if the two methods yield consistent results and we would want to compare results we get on data. Since the unfolded spectrum in summer was normalized to unit area, the ratio PBRBR/BRBR is the only thing we can compare here. Cheers, Kerstin