[Clas_cascades] Notes: Sep 16

[kijun park]

Elton Smith wrote:
> Lewis: It would be easiest for Hovanes and I to give you annotated copies
> of your normalization note instead of typing in comments. Could you let me
> know your schedule so that we can give these to you before you go back to
> SC?
>
> Thanks, Elton.
>
> ----------------------------------------------------------------
>
> On the phone: Haiyun, Zhiwen  <br>
> Notes by Elton.
>
> == [[Update 8-26 | Normalization studies]] (Lewis) ==
> # Lewis sent out a link to the latest version of the Normalization Note at
> [[Image:Usc ana note eg3.v1.01.pdf]]
> # Elton and Hovanes took a brief look at it and will send comments
> separately
> # Discussion centered around Table 3:
> #* It is not understood why in the first row, the numbers are so different
> between the second column (20-30%) and third columns (1-2%), since the
> normalization factor have only changed by less than 5%.
> #* Hovanes: need to understand how these numbers have been obtained to
> assess their implications
> #* Haiyun: The factof of 4.7 smooths out the cross section for pion
> production, but the Lambda cross sections show smooth variation witb
> factors of about 4.55. He noted that this could be due to the 2D fits that
> are performed on the pion data.
> #* Hovanes: For the Phi-- paper we will like to use the uncertainties
> estimated between 2-4.5 GeV, quoting the consistency with the value 4.5-5
> GeV. But at the moment the numbers are not very consistent.
>
> == Phi-- (Hovanes) ==
> # Attempted to eliminate the bad performing T-counters from the Phi--
> analysis.
> # The plan is to eliminate Ecounters that are in coincidence with poorly
> performing T-counters from both the data and the gflux normalization.
> # This proved more difficult than anticipated due to technical
> difficulties. The UNH cluster was upgraded and required considerable
> effort to get the codes working again. At the moment global variables used
> for selection cuts are not working as before, Feature or bug of upgraded
> ROOT system?
>
>
> == Next Meeting, Wed Sep 23 ==
> # Feedback on normalization note to Lewis
> # Hovanes to update Phi-- note to eliminate poorly performing T-counters
>
> Elton Smith
> Jefferson Lab MS 12H5
> 12000 Jefferson Ave
> Suite # 16
> Newport News, VA 23606
> elton at jlab.org
> (757) 269-7625
> (757) 269-6331 fax
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>   
Hi, all.
I  missed last meeting due to sick. I guess Lewis wasn't at the meeting 
either. I hope this plot on the linked web could help us to understand a 
little bit more.  (please correct me Lewis, the last plot [named 
"comparison EG3 (09/09 vs. previous)"] is the comparison of cross 
section with trigger factor of between 4.5 and 4.7)
http://www.jlab.org/Hall-B/secure/e1-6/parkkj/g11_analysis/report/09092009.html
index :   triangle = 4.5 and circle = 4.7

Sincerely yours,
Kijun