[Sane-analysis] Minutes of March 9 Analysis Meeting

[Narbe Kalantarians]

_*Anusha:*_ Applying azimuthal (angle) corrections to try fixing xptar 
vs. W correlations. This seems to make the elastic peak shift some 
towards higher W. The peak is sharper though, but the xptar data/MC 
seems to get worse. Shifting both data and MC. Will try shifting only 
one (data) and try tweaking the correlation term.
https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Azimuthal_Angle_Correction_for_target_mag._field


_*Narbe:*_ Gave an update on BETA dilution factors. Tried 2 different 
weightings; by charge and only by cross-section. Compared with another 
MC, which is a version of pol_hms_single altered to have an acceptance 
similar to that for BETA. The df's weighted by cross-section seem to 
agree with the other MC. These look more reasonable. Looked at rates, 
luminosities, and cross-sections from both MC's and they seem to be 
consistent. There seems to be some bin migration giving events at low W, 
possibly from energy and position reconstruction. Will try taking 
regions of scattering angle-theta similar to what HMS had to compare.
https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Packing_Fraction#03.2F09.2F2011


_*Jon:*_ Studying the effects of Cerenkov cuts on the raw asymmetries. 
Looked at a (parallel-field)Carbon run, parallel-field run, and a 
perpendicular-field run; all 4.7GeV. Varied energy ranges. Examining the 
timing peaks. This is in progress. Will add more runs and later correct 
for polarization and charge.
https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Jrmcerh


_*Whit:*_ Produced an event display feature for his analyzer, to look at 
plots relevant to each detector, to examine geometry and timing of 
events. Using CODA type-5 events. Will apply a lower-bound cut to the 
BigCal ADC's to cut out background/noise some.
https://hallcweb.jlab.org/experiments/sane/wiki/index.php/InSANE_Event_Display


_*Luwani:*_ Looking at pi0 asymmetries. Correcting for polarizations. 
Seem to be fairly stable and consistent with 0. Will look at average 
values separated by energies and angles. Will superimpose P_B*P_T on 
asymmetry plot.
https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Wednesday_Mar-09,_2001


_*James:*_ Looking at distribution of asymmetries around the mean value. 
Looking at cuts on cluster energy; greater than and less than 0.8GeV. In 
progress and says there might be a bug in his code.
https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Raw_Asymmetries#Distribution_of_Asymmetries_Around_Mean:_3.2F9.2F2011 
Plotting asymmetries with different cuts. Looked at all of 5.9GeV 
perp-field data and the other energy/field data are in progress as runs 
finish replaying.
https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Raw_Asymmetries#Plotting_Average_Physics_Asymmetries_with_Different_Cuts:_3.2F9.2F2011


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

Next meeting will be March 16th 3:30pm JLab time.



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