From: Glen Warren (gwarren_at_anti-spam)
Date: 24-Jun-2003 17:18:55
GEn01 analysis meeting June 24, 2003
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attended by:
Oscar at UVa
Paul, Jim, Frank, Nikolai and Glen at JLab
REPORTS
*) Background: done. See roughly 2% and 0.5% for Q2=0.5 and 1.0,
respectively.
*) CEX: Frank received answers from Marko. Marko provides a relative
corrected to the asymmetry, but he used old butcher results. Frank is
currently incorporating this info into Butcher.
*) target polarization: Paul needs to send new file to list.
*) paper: Glen has begin working on the paper. He hopes to have a very
rough draft version completed by next week.
*) Gmn: Glen dictated that we will use the average of the Kelly and
Basel Gmn values, and make the uncertainties large enough to include the
uncertainties from the Kelly model.
*) extraction uncertainties: The idea was raised to use calculate the
theoretical AVed for each data point, instead of using the MC to do the
average over the acceptance. The conclusion was that the idea is good,
but will have little impact on our results, so it is not worth pursuing
at this time.
We agreed to drop the extraction uncertainties, because they are so much
smaller than our other uncertainties.
*) Kinematic uncertainties: we agreed to include the kinematic
uncertainties, and to evaluate them by looking at calculating
derivatives for measurement based quantities, i.e. E, E', tht_e, tht_t
and ypos. The first four can be can in MC, but ypos should be done
using the data because ypos in MC doesn't impact other variables
directly. The alternative is to do the shift in the data and see how
the asymmetry changes. Nikolai will undertake this campaign. Frank
reminded Nikolai to compare the syncfilter reports to make sure that the
same parts of each runs get analyzed.
Donal
*) work on paper.
*) review surveyors reports are target alignment
Glen
*) work on paper
Hongguo
*) kinematic uncertainties for E,E',tht_e for both Q2
Nikolai
*) kinematic uncertainties for ypos for both Q2
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