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> > Is it possible to make a comparison for events with and without > > K0S->pi0pi0 (in the generator block)? I am not sure, I guess we'd need > > to look at the relevant variables for the following > > - all events > > - events without K0S->pi0pi0 > > - events with K0S->pi0pi0 > > > > I'm going to look at this... The neutral page ( http:/www.slac.stanford.edu/~asrti/recoil/neu_stu/ ) has been updated: a) differences btw 'by hand' method and isAncestor are vanished b) study is performed over 10kev d0 bpcocktail (full study is on batch..) c) the ks-> pi0pi0 study is added There are still some differences btw sp3 and sp4 but are not striking! The most important differences is on the number of the gammas that are matched to the B or not. In sp3 only 1 gamma over 30 is not recognised as coming from a B in sp4 the fraction is 50% ( 1 over 2). Those gammas that are not coming from a B have the following distribution: ~50% have a mother with index == 0 (Upsilon4S) ~50% have a mother with index == -1 (I do not know what this means in terms of MC production: ISR ???) I don't see any striking difference in the distribution of gammas in events with or without Ks. Let me know any comment or question, Cheers, Alessio