[Sane-analysis] fit to world asymmetries

[O. A. Rondon]

I have converted g1 and g2WW obtained from the AAC PDF's to A1, assuming
g2 ~ g2WW, which should not be too inaccurate at 3 GeV^2.

A1 = 1/F1 (g1 - gamma^2 g2WW)

I have plotted our data (octavian replay) alongside, and it looks closer
to this model A1 than to the CLAS one.

So everyone can look at the ingredients I have also plotted Peter &
Erics's F1 (data points are the ones in James' tables, continuous curve
is my interpolation to the x values of the PDF's g1) and the input g1
and g2WW from the AAC. Some resonance structure seems to show up in F1
at high x. The wiggles are caused by the interpolation. The plots are here
https://hallcweb.jlab.org/experiments/sane/rondon/analysis/asym/g1g2/A1_AAC-SANE_3.pdf

I think that comparing to the CLAS model may not be a good idea, since
it  seems to overestimate A1 at high x. I realize that there are other
PDF parameterizations that we should try (Leader-Smirnov-Stamenov - LSS,
Bluemlein, etc.) for comparison, but I would caution about being misled
by the CLAS curve when looking at our data.

We have measured g2 and we should make sure all our ingredients to get
g1 and g2 are right, but in the end our A1 will be what matters, not
whether it agrees with the CLAS model.

Anyone can make their own A1(AAC) using the PDF's at the URL below,
Peter & Eric's F1, and gamma for our kinematics.
http://spin.riken.bnl.gov/aac/

Cheers,

Oscar