[Sane-analysis] Minutes of April 6 Analysis Meeting

[Narbe Kalantarians]

_*Hovhannes:*_ Posted a draft of his talk on SANE to be given at the DIS 
conference next week.
https://wiki.bnl.gov/conferences/index.php/DIS-2011
He'll welcome any questions/comments.
http://www.jlab.org/~bhovik/SANE/TalkDIS2011.pdf


_*James:*_ Began a table listing runs to be used for analysis. The 
format is logic-style. Adding runs as they get replayed. Using gscalers 
510 and 538 for the live-time. Will switch to the 510*(513+514)/505 as 
determined by Hovhannes. 
https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Scaler_information
https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Good_Runs_for_Analysis#New_Version
Will add a column for number of events and also one for comments.
Starting to work on radiative tail with Karl.


_*Oscar:*_ Did a study of the false asymmetries. Referring to James' 
study where he swapped the definitions for charge-normalization  
(https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Raw_Asymmetries#Charge_Normalization_Switch:_3.2F30.2F2011)
Mark looked further in to this and found that this can't really be done 
because it produces an inconsistency int the labeling. Using Mark's 
model for the live-time. Posted the spread-sheet in the same directory 
where his note is posted.
http://twist.phys.virginia.edu/~or/sane/analysis/charge_a/false_A_5.9-80_c.pdf


_*Luwani:*_ Plotted asymmetries for neutral pions with P_Beam*P_Targ. 
There seems ot be a dependence on P_Beam*P_Targ, similar to what is 
being seen for the physics asymmetries.
https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Pi0_Asymmetry_with_beam_and_target_polarization
Also plotted asymmetries with charge-normalization.
https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Pi0_Asymmetry_with_charge_normalization
Will plot pi0 asymmetries with both of these corrections together, and 
try grouping P_Beam*P_Targ by average.


_*Narbe:*_ Set the SANE GEANT to have outside liquid helium on the edges 
of the target cup. Got this working shortly before the meeting and 
running the MC to get statistics to check for effect on dilution factors.
Began using Peter Bosted's radiative corrections code for the BETA 
kinematics.


As always, please let me know if I missed anything or if I made any 
mistake(s).

Next meeting will be April 13, 3:30pm JLab time.

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