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First, let's make sure that Beta and anaRecoil are equivalent as far as
the PID killing is concerned... then no objections. Once we will have a
large fraction of new skimmed generic MC we will rerun everything

Daniele

On Wed, 28 Aug 2002, Riccardo Faccini wrote:

> 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
> >
> >
> >
> >
>
>