[Clas12_verystrange] Figs 23-24

[Derek Glazier]

Hi,
   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.
   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.
Cheers
Derek

On 04/27/12 17:53, Michael Dugger wrote:
>
> Eugene,
>
> 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.
>
> 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.
>
> 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.
>
> Take care,
> Michael
>
> On Thu, 26 Apr 2012, Eugene Pasyuk wrote:
>
>> Folks,
>> Figs. 23-24 need an improvement. The background simulation has too small
>> statistics and a very large scaling by the cross sections makes it look
>> ugly. Can we generate more background events? Also we should use
>> comparable bin size for signal and background.
>>
>> -Eugene
>>
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>
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