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<u><b>Hoyoung(from 10/19/10):</b></u> Looked at HMS asymmetries for the
perpendicular runs that were showing the sudden positive trend in the
BETA asymmetries (72824-72832). Doesn't see that trend in the HMS
asymmetries. Charge asymmetries seems large. Using the information from
the scaler files (gen[run#].txt) instead of ntuple variable, but they
should be the same. Will check on this and look at some more HMS
perpendicular asymmetries.<br>
<a class="moz-txt-link-freetext" href="https://hallcweb.jlab.org/experiments/sane/wiki/index.php/HMS_total_asymmetry">https://hallcweb.jlab.org/experiments/sane/wiki/index.php/HMS_total_asymmetry</a><br>
At the phone meeting on Tuesday we determined that the packing
fractions for the parallel-field data is good enough to proceed with
getting the dilution factors. There are still a perpendicular few runs
giving small packing fractions from loads that gave more reasonable
values in the parallel part. As mentioned before, these runs show a
gross mismatch between data and MC mostly looking at the xptarg and
delta P variables. Will try plotting xptarg vs. beamz(vertex) to see if
there is a correlation.<br>
Hoyoung will be at JLab next week and stay for about 1.5 months.<br>
<br>
<br>
<u><b>James:</b></u> Comparing phi from the Bdl given by the GEANT to
the physics phi. The work is in progress.<br>
<a class="moz-txt-link-freetext" href="https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Particle_Tracking_to_Front_Tracker%2C_Target#Hovhannes.27_Bdl_phi_vs._physics_phi_e:_10.2F20.2F2010">https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Particle_Tracking_to_Front_Tracker%2C_Target#Hovhannes.27_Bdl_phi_vs._physics_phi_e:_10.2F20.2F2010</a><br>
Posted a draft of his DNP 2010 talk, discussing mostly the data
analysis details<br>
<a class="moz-txt-link-freetext" href="http://twist.phys.virginia.edu/~jdm2z/santafe/Maxwell-DNP-2010.pdf">http://twist.phys.virginia.edu/~jdm2z/santafe/Maxwell-DNP-2010.pdf</a><br>
<br>
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<u><b>Jon:</b></u> Energy resolution study related to pi0. Looking at
clusters and varying the energies. The pi0 mass peak doesn't appear to
be Gaussian, but that might be from the higher energy background being
on one side of the peak. <br>
<a class="moz-txt-link-freetext" href="https://hallcweb.jlab.org/experiments/sane/wiki/index.php/JrmEResolution">https://hallcweb.jlab.org/experiments/sane/wiki/index.php/JrmEResolution</a><br>
Will have a draft of his DNP 2010 talk soon, discussing mostly the
physics motivation.<br>
<br>
<br>
<u><b>Anusha:</b></u> Looking at the raw and physics elastic
asymmetries. Plotted both by individual run# and into groups by load.
The asymmetries seem large. This could be from the dilution (using 60%)
being underestimated. Will print asymmetries into table form (run#,
counts by helicity, charge, dead-times) to get better idea of what is
going on.<br>
<a class="moz-txt-link-freetext" href="https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Raw/Physics_Asymmetry">https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Raw/Physics_Asymmetry</a><br>
Posted a draft of her talk for DNP 2010, discussing the elastic
asymmetries<br>
<a class="moz-txt-link-freetext" href="http://www.jlab.org/~anusha/Talks/DNP-2010.pdf">http://www.jlab.org/~anusha/Talks/DNP-2010.pdf</a><br>
<br>
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As always, please let me know if I missed anything or made any
mistake(s).<br>
<br>
Next meeting will be October 27 at 15:30.<br>
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