After discussion at yesterday's meeting
---------- Forwarded message ----------
Date: Mon, 4 Nov 2002 16:52:37 -0500 (EST)
From: Tancredi Botto <tancredi@mitlns.mit.edu>
To: Chi Zhang <zhangchi@mit.edu>
Cc: "[Blast_Anaware]" <blast_anaware@rocko.mit.edu>
Subject: Re: [BLAST_ANAWARE] cc_eff2.C updated in phase2
Chi, the connection should be back on.
I am surprised by these "bad" results. Also, why don't you
use cuts on the eep ntuple. All we need is to put (hardcoding is fine
in this case as this will never really change) and few good ep
combinations. I'll give the ones that worked for me (there is no company
secret)
LC0 : (ntr=13 & 0 < ntl < 3 & ncr = -1 ) & atr> 8000
RC0 : (ntl=13 & 0 < ntr < 3 & ncl = -1 ) & atl> 8000
LC1 : (ntl=5 & 10 < ntr < 13 & ncr = -1 & ncl = -1 or 1) & atr > 8000
RC1 : same as above, mutatis mutandis
the proton cut (adc >8000) may vary (we may change that online)
for RC2 I had (ntl = 8or9, & ncl=-1 & ntr = 9or10) & atl > 8000
you should get close to the CC efficiency shown at the collab meeting,
attahced in .ps as a function of the proton ADC cut
-- 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 Mon, 4 Nov 2002, zhangchi wrote:
>
> Hi, all, as requested by Tancredi, I finished (at least I hope) cc_eff2.C
> some one started but left unfinished.
>
> Unfortunately, I just lost connection to blast02/05 from campus so can not
> finish the test of codes. The code was run on 2508 which is the latest
> eep in root_ntuple directory.
>
> Cuts used are combinations of plnn/prnn from Cuts.C. You can see the code for
> cuts imposed. The running gets painfully slow because of the long cuts.
>
> The numbers for efficiencies are suprisinly low, 30% for left box 0, so I
> think some cuts need to be adjusted. but I can not do it without a
> connection to Bates.
>
> Chi
>
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