[Sane-analysis] Minutes of June 30 Analysis Meeting

[Narbe Kalantarians]

_*Hoyoung:*_ Working on packing fractions. Used tracking efficiency 
method from Anusha. Expanded range of scintillator paddles to minimize 
edge effects and fit on the efficiencies to look at carbon run 73027. 
Obtained new packing fractions using this. These didn't change too much 
but there was some improvement. Looked at low efficiency runs during HMS 
DC problems, sorting through by ELOG entries. Oscar suggested doing a 
check with the slow raster, looking at top and bottom half of target cup 
to look for settling of material. It seems reasonable that the packing 
fractions could be finished by around the end of July.
https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Hykang#Packing_Fraction


_*James:*_ Looked at raw (double-spin)asymmetries for parallel runs with 
varying energy cuts. The asymmetries seem to increase as energy is 
increased. Found a bug in code for cutting on Cerenkov (cer_h), which 
seems to make his asymmetries converge with what Jonathan got few months 
back with older replayed ntuples.
Going to be looking some more at projecting hits on front tracker, 
imparting slow raster for physics azimuthal angle phi_e.
https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Raw_Asymmetries#Asymmetry_change_with_Energy_Cut:_6.2F30.2F2010


_*Anusha:*_ Looking at elastic physics asymmetry as function of W. Used 
target polarization from table prepared by James. Looked at correlations 
between slow raster x&y and xptar  vs W. Oscar mentioned such 
correlations were seen during RSS and that an empirically determined 
azimuthal dependence was implemented to resolve this.
https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Elastic_Events_/_Asymmetry


As always, please let me know if I missed something or made a mistake.

Next meeting will be July 7.
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