[Clas_cascades] Meeting tomorrow at 10:00 am (fwd) - short notes

[Stepan Stepanyan]

Short note of the meeting -
Lewis on the phone
Kijun, Hovanes, and Stepan at JLAB

- Lewis presented a new results on the cross sections. He found some 
additional
factor accidentally left in the script when last time data were shown 
after the tagger
correction. That was the reason of having higher (~30%) cross section. 
After fixing
that and running analysis (on ~50% of data) he now had consistent 
results. Lewis's
new comparison of old-stile eg3 analysis and the new results were quite 
consistent.
in the new analysis, for events with multiple photons he studied 
kinematical cuts with
each photon and if any of photon passed cuts he used that. The new and 
old results
coincide with each other quite well in the region of energy <4. For 
higher energies
the new results are some what lower. Next week he will have the full 
statistics.
http://clasweb.jlab.org/rungroups/eg3/wiki/index.php/Multiple_Hit_CRS_Difference

- Kijun studied the difference between multi-photon correction factor in 
g11 for runs
with different end point energy. After removing kinematic cuts, he got 
close number
for both end point energy runs, 17-23% correction, that is consistent 
with g11 analysis.
He mentioned that there is some small run-by-run difference for this 
correction.

- Lewis mentioned that Ralf has a conflict with this meeting time, 
Wednesday 10am.
We should find some solution to this.

Regards, Stepan 

Elton Smith wrote:
> Dear Hovanes and Stepan,
>
> Dry runs for the Lehman Review have been delayed from 8:30 to 9:30 so they
> overlap with the eg3 meeting and I will not be available. Please go ahead
> without me.
>
> Sorry for the late notice.  Thanks, Elton.
>
>
> 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
>
> ---------- Forwarded message ----------
> Date: Tue, 13 Apr 2010 15:24:00 -0400 (EDT)
> From: Elton Smith <elton at jlab.org>
> To: clas_cascades at jlab.org
> Subject: [Clas_cascades] Meeting tomorrow at 10:00 am
>
>
> Dear collaborators,
>
> We will have our weekly meeting tomorrow at 10:00. Locals: the room is
> F227. I will be in dry runs before 10 am, but it might go over, so please
> start without me.
>
> Thanks, Elton.
>
> == Next Meeting April 14, 10:00 am ==
> # Check eg3 correction for multiple photons using the otherwise exact code
> (Lewis).
> # Update Delta produdction for both G11 and eg3 based on committee
> comments.
>
>
> 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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>