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Hi,<br>
As Mike points out it really needs a lot more simulation work to
improve the plots. Perhaps it should be decided at the phone meeting
whether this should be done or not, I will not be able to make it
this evening. For Fig. 23 perhaps the background histogram could be
replaced by a smooth fit or Mikes larger statistics histogram. For
Fig.24 I do not think it is worth the effort as the conclusion is
the background is negligible with the vertex cut.<br>
One comment on the abstract, the numbers for Omega- is slightly
wrong, 8k instead of 6.9k estimated. But this number is for the case
where no Omega- decay products are detected and there is a large
background. In practise the cross section may have to be measured by
detecting either an additional pi- or K-, which should give a total
of around 2k events. I am not sure how much attention we want to
bring to this in the abstract, it seems the reviewer also did not
pick up on this, however a PAC reviewer may.<br>
Cheers<br>
Derek <br>
<br>
On 04/27/12 17:53, Michael Dugger wrote:
<blockquote type="cite" cite="mid:Pine.LNX.4.64.1204271235400.15266@ifarm1102.jlab.org">
<br>
Eugene,
<br>
<br>
I have attached a version of Fig. 23 that has finer binning for
the background (Omega3K.eps). For consistency, it might be best
for Derek to produce the figure that goes in the paper, but he
might not have the statistics to do so.
<br>
<br>
The Pythia determined backgrounds take a lot of time to generate.
Currently I have generated 98 million background events. It will
take 10 or 20 times my current statistics to do the same sort of
binning for Fig. 24.
<br>
<br>
We may need to keep Fig. 24 as is. I'll start generating more
backgrounds to see if I can get a decent looking figure with finer
binning.
<br>
<br>
Take care,
<br>
Michael
<br>
<br>
On Thu, 26 Apr 2012, Eugene Pasyuk wrote:
<br>
<br>
<blockquote type="cite">Folks,
<br>
Figs. 23-24 need an improvement. The background simulation has
too small
<br>
statistics and a very large scaling by the cross sections makes
it look
<br>
ugly. Can we generate more background events? Also we should use
<br>
comparable bin size for signal and background.
<br>
<br>
-Eugene
<br>
<br>
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