Hi all,
I've finished the last tests that were requested before running the full
sys study.
I've produced:
1) True KL true energy spectrum:
http://www.slac.stanford.edu/~asarti/recoil/devel/KLstu/energyTrueKL.eps
2) True KL calorimeter energy deposit spectrum:
http://www.slac.stanford.edu/~asarti/recoil/devel/KLstu/ReleasedEn.eps
(I'm redoind ig on the full generic MC sample with a proper X scale :)..)
4) MC energy spectra of KL selected on 'control sample (PRMM2>-3)' with a
likelihood cut (likelihood>0), enriched region:
http://www.slac.stanford.edu/~asarti/recoil/devel/KLstu/true_vs_all.eps
In red are shown the candidates that are TRUE KL (the fraction is decent:
the associator and the likelihood method results are in reasonable
agreement)
3) Data-MC comparison for TRUE and FAKE MC KL (were true or fake is
dictated by the MC associator):
true:
http://www.slac.stanford.edu/~asarti/recoil/devel/KLstu/trukl/comparison5mxminpileptoncuts.ps
fake:
http://www.slac.stanford.edu/~asarti/recoil/devel/KLstu/fakekl/comparison5mxminpileptoncuts.ps
Given that almost all the KL < 200 MeV are 'FAKE' I have tried to
re-estimate the correction that comes from just events with KL > 200 MeV.
Data MC comparison is shown in:
http://www.slac.stanford.edu/~asarti/recoil/devel/KLstu/CUT/comparison5mxminpileptoncuts.ps
and the correction comes out to be ~1 (no correction).
In order to be conservative I porpose to use the correction that comes
from the study with the full KL sample (correction ~1.22).
***********Implementation*************
Now that Urs need to rerun anaQa in order to estimate the sys I propose
to add (in the loop that creates the four vectors of neutral particles in
'recoil' subroutine) the following piece of code:
if( idGam[i] == 130 ){
energyGam[i] *= (0.274351/0.225545);
}
just before any manipulation of that quantity.
That should be enough.
Let me know if that is enough or if any further check is needed.
alessio
______________________________________________________
Alessio Sarti Universita' & I.N.F.N. Ferrara
>>>I'm in Ferrara<<<
tel +39-0532-974328 Ferrara
roma +39-06-49914338
SLAC +001-650-926-2972
"... e a un Dio 'fatti il culo' non credere mai..."
(F. De Andre')
"He was turning over in his mind an intresting new concept in
Thau-dimensional physics which unified time, space, magnetism, gravity
and, for some reason, broccoli". (T. Pratchett: "Pyramids")
