[Sane-analysis] Minutes of November 30th Analysis Meeting

[Narbe Kalantarians]

_*Hovhannes:*_ Looking at pion contribution. Comparing data and MC. 
There seems to be some energy dependence, and the MC predicts more pions 
at higher energies. This could be due to the model being used (Wiser). 
Adding more statistics. This contribution will also be dependent on 
dilution factors.
https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Pion_Contribution


_*Anusha:*_ Update to comparisons of data/MC. Looking at NH3 and deltaP 
vs W. It seems that opening up the deltaP cut/range gives some 
improvement on the elastic peak position.  Eric mentioned to use some 
caution in increasing the cut/range, because going higher in negative 
deltaP could result in hitting the can, plus the optics matrix is not 
very well known for this. Will compare with C run(s).
https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Updates_on_11/30/2011-NH3


_*Hoyoung(Dec 1):*_ Comparing data/MC adjusting the slit position on the 
MC to get reasonable agreement with some of the HMS runs where the slit 
was (partially) closed. Adjusting it to ~8.8cm seems to give reasonable 
comparisons.  Though, deltaP still doesn't seem to look good. For the 
pf's, could try using region with reasonable data/MC agreement (~ -5 < 
deltaP < 5). Also, C+He run 72442 was an early run and 
parameters/settings (target position, drift-chamber gases - 
efficiencies, ...) were not well established. Will look at NH3 runs, one 
each for top and bottom cup to check things. Starting to redo packing 
fractions for the parallel data with the updated/corrected HMS replay 
code. 
https://hallcweb.jlab.org/experiments/sane/hykang/pf/20111129/


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

Next meeting will be December 7th at 3:30pm (JLab time).


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