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Hi all, I reoptimized the cut on the purity (since the selection is changed and the full dataset is available). The stat. significance as a function of the cut on the purity (all analysis cuts applied) is in: Dstar http://www.slac.stanford.edu/~daniele/vub/optpur/dstaropt.eps Dc http://www.slac.stanford.edu/~daniele/vub/optpur/dcopt.eps Dstar0 http://www.slac.stanford.edu/~daniele/vub/optpur/dstar0opt.eps D0 http://www.slac.stanford.edu/~daniele/vub/optpur/d0opt.eps The optimal values now are - D* ipur > 24% - Dc ipur > 9% - D*0 ipur > 8% - D0 ipur > 9% before they were - D* ipur > 14% - Dc ipur > 6.5% - D*0 ipur > 5% - D0 ipur > 6% I propose to apply these new cuts. The yields will be 15-20% lower with a large gain in purity and in the number of selected events. If you agree, I will commit the new cuts. Daniele