[Sane-analysis] Minutes of June 23 Analysis Meeting

[Narbe Kalantarians]

_*Anusha:*_ Looked at elastic electron data from HMS. Sees a sizable 
double spin asymmetry. This would provide a <Q^2> point of 2.2GeV^2. 
Used ntuple variable for target polarization. Will use values from table 
prepared by James.
Did some work on packing fraction, correcting with tracking efficiency 
to start estimating dilution/background. Will use vertex_z offsets by 
insert as done before by Narbe and Hoyoung.
https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Elastic_Events_/_Asymmetry


_*James:*_ Started looking at asymmetries. Used Jon's code as basis and 
analyzed files made with latest Analyzer on CVS. The energy calibration 
seems to shift more events to lower energy. So he loosened E_min cut 
from E_min>1.3 -> E_min>1.0GeV. There is still a considerable shift in 
the asymmetry. He and Jon will compare with ntuples from older Analyzer, 
also looking at pi0 mass peak and E_clust.
https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Raw_Asymmetries#Starting_Out:_6.2F23.2F2010


_*Jon:*_ Implemented a cellular automata routine for cluster 
reconstruction into a his won physics MC (pmc). Will use it, throwing 
pi0's, to compare with the Analyzer.


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

Next meeting will be June 30th at 3:30pm

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