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<u><b>Anusha:</b></u> Looking at ep elastics, specifically plots of
x-diff & y-diff versus slow-raster_x & slow-raster_y, versus
xtar & ytar, and versus xptar & yptar. This is to check the
latest calibrations. Saw some correlations that need some further
investigation, such as whether correct signs are used for field or
slow-raster relative to BETA coordinate system.<br>
<br>
<a class="moz-txt-link-freetext" href="https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Ep_Elastics">https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Ep_Elastics</a><br>
<br>
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<u><b>Oscar:</b></u> Made database of CH2 runs. This can be found at
"Run Info", under "Alternative databases".<br>
<a class="moz-txt-link-freetext" href="https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Main_Page#Run_Info">https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Main_Page#Run_Info</a><br>
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<u><b>Hovhannes:</b></u> Looking at mass of final states W
distributions for BETA. Had trouble seeing the proton peak, even after
subtracting the carbon (for background subtraction). Oscar and Mark
mentioned that the resolution would cause it to be very wide (~200MeV
or so), and thus make it very difficult to see. Mark suggested trying
cuts on x-diff and y-diff. Oscar suggested perhaps using some fiducial
region on the surface of BigCal, to cut out edges.<br>
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<u><b>Narbe:</b></u> Made some generated and reconstructed ntuples for
Oscar to look at for the phi vs. theta study he mentioned last week.
The reconstructed theta seemed to be reasonable for the case of
parallel field and no field, but a little off for perp field. This is
probably due to reconstruciton being originally done with some
empirical correction that doesn't seem to be compatible with per
field. The reconstructed energy seems to be reasonable.<br>
<br>
<a class="moz-txt-link-freetext" href="http://www.jlab.org/~rondon/sane/analysis/geant/tht-clust_tht.gif">http://www.jlab.org/~rondon/sane/analysis/geant/tht-clust_tht.gif</a> <br>
<a class="moz-txt-link-freetext" href="http://www.jlab.org/~rondon/sane/analysis/geant/p-clust_e.gif">http://www.jlab.org/~rondon/sane/analysis/geant/p-clust_e.gif</a><br>
(black=thrown, red=reconstructed)<br>
<br>
Working on reconstructing theta and phi from simulation in same way
Hovhannes does with the Analyzer for data. Seemed to be getting
sensible numbers before applying polynomial corrections. Not completely
sure he's applying it correctly though. <br>
<br>
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<u><b>James: </b></u> Working on writing script to be able to run GEANT
in batch jobs.<br>
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Next meeting will be March 17th at 3:30pm<br>
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