[G12] pass1 cooking

[Gagik Gavalian]

My apologies, I analyzed 5 files instead of 2 (forgot to comment one 
line in the script, one wonders what else I might have forgotten) from 
pass1 to produce the figure, and it does contain twice more statistics, 
I'm attaching the new figure with 2 files only from pass1.

Anyway, it will be nice if one could check my findings from the files 
from pass1 located in:
/w/hallb/clasg12/gavalian/g12Pass1Skimmed

I did not understand what might be bad in seeing more omega events in 
pass0 compared to pass1. You think these events might be fake ?

Gagik.

On 2/10/10 4:53 PM, Eugene Pasyuk wrote:
> Certainly, the difference needs to be understood. I don't know, it 
> might be that omega does not like this cut and the fact that you see 
> it in pass0 is not necessarily a good thing. Overall you have twice as 
> many events from pass1 compared to pass0.
> I am not claiming anything, just a thought.
>
> -Eugene
>
> Gagik Gavalian wrote:
>> Dear Eugene,
>>
>> You're right, no reason to have that cut, but my skim was not 
>> intended for the omega, it's just omega was the most abundant 
>> particle I could extract from 2 files of my skim to check the quality.
>>
>> Like I mentioned in the e-mail, I'm in process of cooking the same 
>> files (without any implicit cuts) using calibration constants from 
>> pass0. They might be ready in a day or two, and I'll give an update.
>>
>> Nevertheless, even with the cuts on pi+pi- mass, the disappearance of 
>> omega is a little troubling.
>>
>> Gagik.
>>
>> On 2/10/10 4:40 PM, Eugene Pasyuk wrote:
>>> Gagik,
>>>
>>> I think more conclusive test would be to check for omegas without 
>>> 0.44<M(pi+pi-)<0.54 cut.
>>> What's the reason to have it on the first place if you look for omega?
>>>
>>> -Eugene
>>>
>>> Gagik Gavalian wrote:
>>>> Dear All,
>>>>
>>>> As I mentioned at the meeting I have some concerns about the pass1 
>>>> cooking, at this point it's a concern so it will be nice if someone 
>>>> could double check this !
>>>> So, I selected events from pass0 cooked files with final state 
>>>> "pi+pi- proton", and required
>>>> missing mass of (pi+pi-proton) to be 0 < MM(pi+pi-p)<0.28, since I 
>>>> preskimmed this sample there is an implicit cut on invariant mass 
>>>> of pi+pi-, and it is, 0.44<M(pi+pi-)<0.54, and when I plot the 
>>>> missing mass of proton with above described cuts from pass 0 I get 
>>>> a nice peak for omega.
>>>> I selected omega events (shown on figure pass0_pipip.pdf, see 
>>>> attachment), the event numbers are in the attachment 
>>>> (eventsOmega.evt) and all the events are from two files 
>>>> run_57276.A40 and run_57276.A43.
>>>>
>>>> Then
>>>> I printed out the content of EVNT bank and PART bank (it's called 
>>>> GSIM in the printout, it's really the content of PART(1) bank) for 
>>>> both pass0 and pass1 (though pass0 does not have PART(1) bank in 
>>>> the skim so it's printout is empty). Though I'm cooking those same 
>>>> files now using calibration constants for pass0, I'll probably have 
>>>> full info on it then.
>>>>
>>>> But, meanwhile, I also run my analysis code on the same files from 
>>>> pass one cooking,  and the result is in the attachment (file: 
>>>> pass1_pipip.pdf).
>>>>
>>>> I'm now a little concerned that it might be due to my analysis code 
>>>> that I miss those omega events in the pass1, could someone please 
>>>> check with their own analysis code the files from pass one for 
>>>> omega events.
>>>> Here are the details:
>>>> The files are located at Jlab:
>>>> /w/hallb/clasg12/gavalian/g12Pass1Skimmed
>>>>
>>>> and it's the complete set of skimmed files (1 through 5 includes 
>>>> other), the plot pass1_pipip.pdf, is a selection of events
>>>> proton pi+ pi- where:
>>>>
>>>> 0.44 < M(pi+pi-) <0.54
>>>> and
>>>> 0.<MM(p pi+pi-) <0.28
>>>>
>>>> and the missing mass of proton is plotted !
>>>>
>>>> So the figure pass0_pipip.pdf is the same thing from pass0 from 
>>>> exact same files !
>>>>
>>>> Gagik.
>>>>
>>>> ------------------------------------------------------------------------ 
>>>>
>>>>
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