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<u><b>Jon:</b></u> Did a write-up of the extraction of the physics

asymmetries A_1,A_2 and spin structure functions g_1, g_2 from the

measured asymmetries A_para, A_perp <br>

<a class="moz-txt-link-freetext" href="http://twist.phys.virginia.edu/~jrm2zq/sf_deriv.pdf">http://twist.phys.virginia.edu/~jrm2zq/sf_deriv.pdf</a><br>

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<u><b>Narbe:</b></u> Set GEANT to include liquid helium at the edges of

the target cups and looked at dilution factors. These seem to be

reasonable, with some fluctuations probably due to statistics.<br>

<a class="moz-txt-link-freetext" href="https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Packing_Fraction#04.2F13.2F2011">https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Packing_Fraction#04.2F13.2F2011</a><br>

Started looking at external radiative corrections for dilution factors.

The elastic part of the rad-corrected cross-section seems to be jumping

around. Will talk with Vahe about this.<br>

<a class="moz-txt-link-freetext" href="https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Kinematics#04.2F06.2F2011">https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Kinematics#04.2F06.2F2011</a><br>

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<u><b>James:</b></u> Started looking at elastic radiative tail

corrections. Met with Karl and got started using his code, which uses

Andrei Afanasev's RADCOR. Using RSS as a basis. Seem to look reasonable

at first attempt.<br>

<a class="moz-txt-link-freetext" href="https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Radiative_Corrections#Starting_with_Elastic_Radiative_Tail:_4.2F12.2F2011">https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Radiative_Corrections#Starting_with_Elastic_Radiative_Tail:_4.2F12.2F2011</a><br>

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<u><b>Anusha:</b></u> Looking again at the elastic asymmetries, from

the runs with scattered electrons detected in HMS. The target

polarization was negative during this time. Assuming a constant

dilution factor of 0.6<br>

<a class="moz-txt-link-freetext" href="http://www.jlab.org/~anusha/SANE/E_HMS/assym/pasym_vs_w.gif">http://www.jlab.org/~anusha/SANE/E_HMS/assym/pasym_vs_w.gif</a><br>

<a class="moz-txt-link-freetext" href="http://www.jlab.org/~anusha/SANE/E_HMS/assym/invar_mass.gif">http://www.jlab.org/~anusha/SANE/E_HMS/assym/invar_mass.gif</a><br>

<a class="moz-txt-link-freetext" href="http://www.jlab.org/~anusha/SANE/E_HMS/assym/asyminfo_total.dat">http://www.jlab.org/~anusha/SANE/E_HMS/assym/asyminfo_total.dat</a><br>

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<u><b>Whit:</b></u> Looked into scenario of if the target field was

reversed.<br>

<a class="moz-txt-link-freetext" href="http://quarks.temple.edu/~whit/SANE/talks/sane_magnet_reversed.pdf">http://quarks.temple.edu/~whit/SANE/talks/sane_magnet_reversed.pdf</a><br>

Prepared some tech notes<br>

<a class="moz-txt-link-freetext" href="https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Whit#Technical_Notes">https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Whit#Technical_Notes</a><br>

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As always, please let me know if I missed anything or if I made any

mistake(s).<br>

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Next meeting will be April 20 at 3:30pm, JLab time.<br>

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