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Thanks Daniele, yes, I suspected the D flavor might be the culprit for decays with Ks, Kl, etc. Shouldn't we also have a problem for B0 , whenever you have a D decaying to a neutral K? Ciao, Vera Daniele del Re wrote: > Hi all, > > starting from the disagreement shown by Ajit in the lepton spectrum > for the wrong sign events for the mode B+->D0pi with > D0->Kspipi we finally discovered the bug. In recoilNtp the flavor and the > charge of the B is assigned looking at the flavor of the daugther D meson. > Unfortunately for D0->Kspipi the flavor is correct only in 50% of the > cases. Then the charge and the flavor of the B+ reconstructed in a mode > with D0->Kspipi were crap. > > This bug should affect B+->D0X with D0->Kspipi (all X systems) in the > following ways: > > - total charge is wrong > - lepton spectrum (applying the charge correlation) is wrong > - all variables that present differences between right sing and wrong > sing could be affected > > I am going to fix the bug (charge and flavor for B+ will be calculated > adding up the charge of all the daughters). Then it should be interesting > to see how the measurement for B+ will change and how the comparison > data-mc will look like (remember that the comparison for B+ was usually > not so good). > > Daniele and Ric