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Hi Urs, the idea is to use the pi0 recipe. I don't think we have something better for the time being ... Heiko On Fri, 18 Jun 2004, Urs Langenegger wrote: > > Hoi Kerstin, > > > why in the BAD 540 analysis the uncertainty coming from neutral > > efficiency has not been included as a contribution to the > > systematic uncertainty? > > Is there a recipe for the inefficiency for single photons? I know of > one for pi0, but not for photons. > > Cheers, > --U. > > >