Hi Urs,
it requires little more work but it is technically feasible.
ciao
ric
______________________________________________________
Riccardo Faccini
Universita' "La Sapienza" & I.N.F.N. Roma
tel +39/06/49914798 Fax.: +39/06/4957697
http://www.slac.stanford.edu/~rfaccini
Univ. La Sapienza. 2,Ple Aldo Moro, I-00185 Roma Dipartimento di Fisica
"I don't understand what you say, but I believe I disagree"
On Wed, 14 Apr 2004, Urs Langenegger wrote:
>
> Hoi Ric,
>
> I realized one drawback (for b->s gamma, not us): Filtering on the
> tagbits precludes dumping all true signal events. This was a point
> specifically raised by Henning. Is there the possibility to filter on
> the truth block?
>
> Of course we can skip the tagfilter business and just save diskspace
> by dumping events with either
>
> reco'ed lepton or photon
> true b -> s gamma
> true b->u l nu (?)
>
> I am not 100% familiar with the terminology of "PID weighting", but
> even PID killing is fine as long as we have data/MC PidTables.
>
> Another drawback is brem recovery if the cut-off is high. But I think
> the diskspace gains would be high enough even when requiring a lepton
> with p*>0.5GeV (i.e. effectively the same cutoff as now).
>
> Cheers,
> --U.
>
>
> Riccardo Faccini writes:
> > Hi Everybody,
> > regardless of the availability or not of the hbook disk space, I think we
> > need to seriously consider the option of saving only events with an
> > energetic lepton or photon. I would also consider applying a purity cut
> > (looser than the final one) at the ntuple generation level.
> >
> > I would say that, assuming we use PID weighting for PID systematics, the
> > semileptonic and b->s gamma analyses would not be affected.
> >
> > While I test the filter to do this, does anybody see any drawback on such
> > a decision?
> > ciao
> > ric
> >
>
|