[Sane-analysis] Minutes of Jan 18 Analysis Meeting

[Narbe Kalantarians]

_****Collaboration Meeting:*_ Oscar mentioned that the spokespeople have 
decided on 2 possible dates for a collaboration meeting; February 27th 
or March 2nd. This would be a morning meeting deal, something along the 
likes of 09:00 - noon. He has already circulated an email.


_*Jon/James:*_ While looking at the asymmetries, A_1, A_2, combining the 
beam energies, Jonathan noticed a discrepancy in the asymmetries from 
the energies in the region ~0.4 < x_Bj < 0.45, 2.1 < W < 2.4 [GeV].This 
seems to come from the fact that E' is different for the beam energies. 
 From this, there appears to be a W dependence of A_1 in the DIS region.
James gets a similar result. He also looked at 2 ways of applying the 
elastic tail radiative corrections (+/- A_RC).
https://hallcweb.jlab.org/experiments/sane/wiki/index.php/JrmCoefficients#Problems_with_Combining_Different_Beam_Energy_Data
https://hallcweb.jlab.org/experiments/sane/wiki/index.php/A1%2C_A2_and_Structure_Functions#Splitting_Results_into_4.7_and_5.9_GeV:_1.2F18.2F2012
Oscar looked at the asymmetries, looking at the 2 cases of how to apply 
the elastic radiative tail correction and compared with some other data 
(CLAS/eg1b). The Q^2 bins seem to converge (i.e. Q^2 dependence 
minimizes) when subtracting A_RC, plus also agreeing better with the 
CLAS data. The labels are reversed in his .pdf files.
https://userweb.jlab.org/~rondon/analysis/asym/Q2/


_*Luwani:*_ Looked further at pi0 asymmetries, correcting for target 
polarization and applying E' cuts. From this it appears that the pi0 
asymmetry is very small seems that the pi0 contribution is more of a 
(background) dilution rather than an asymmetry.
https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Average_Pi0_Asymmetry_with_Target_Polarization


_*Whit:*_ Looking at pi0 production with his MC. Will try applying the 
scattering angle cuts that Jonathan used in his energy resolution study 
(https://hallcweb.jlab.org/experiments/sane/wiki/index.php/JrmEResolution) 
and compare to his results.
http://quarks.temple.edu/~whit/SANE/analysis_main/results/


As always, please let me know if I missed anything or if I made any 
mistake(s).

Next meeting will be January 25th at 3:30 PM (JLab time).


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