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Hi Daniele, I would consider applying PID killing at the root level, at least until a new crucial problem in MC is found. Of course we need to fix the tags and get a correct set, in case we really need to rerun. What are the objections to this approach? ciao ric On Wed, 28 Aug 2002, Daniele del Re wrote: > > > Hi all, > > the disagreement I showed in the last comparison data-MC in many plots > (in p* spectra and mx) is due to a wrong PID killing applied at Beta > level. Actually it seems that the PID killing is not applied at all for > the muons. > > I discovered the problem just redoing the PID killing at root code level > (anaRecoil) and comparing. > > In > > http://www.slac.stanford.edu/~daniele/test2/test2-comp.html > > you find the comparison between the MC with the PID killing at Beta level > and the MC with PID killing at anaRecoil level. > > 1) muons: difference is dramatic. Probably the PID killing was not > applied at all. > > 2) electrons: no striking differences > > In > > http://www.slac.stanford.edu/~daniele/testdatanew/testdata-comp.html > > you can find the new comparison data - MC (using the PID killing at root > code level). (to be compared with the old > http://www.slac.stanford.edu/BFROOT/www/Physics/Analysis/AWG/InclusiveSL/islrecoil/datacock0825_56fb-1/datacock0825_56fb-1-comp.html) > > > All the MC needs to be rerun. We should understand how this problem could > happen and why the tags we are using are not correct. > > Daniele > > > >