See Adrian's email: indeed protons and pions have not been cut out in this
cerenkov "efficiency". That is why we plan (hope) to do better by tagging
a backward elastically scattered proton on a full ep coinc trigger.
-- t
________________________________________________________________________________
Tancredi Botto, phone: +1-617-253-9204 mobile: +1-978-490-4124
research scientist MIT/Bates, 21 Manning Av Middleton MA, 01949
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On Sun, 27 Oct 2002, zhangchi wrote:
>
> I added adc sum<5000 to LC0 too, there is a slight improvement but not
> very mush. I figured 60%, 65%, what s the difference given a lot
> uncertainties elsewhere.
> But it does change results for LC1 significantly, from ~50% to ~70%.
>
> On Sun, 27 Oct 2002, Tancredi Botto wrote:
>
> >
> > well, I meant no elastic protons. But I stand corrected: you can get
> > n-delta and wall protons of course. So an ADC cut could be useful for LC1
> > and RC1, not needed for LC0 and RC0 ? That is actually something I
> > neglected in my on-shift analysis, where I was more focussed on background
> > and timing,
> >
> > any takers ?
> >
> >
>
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