[b1_ana] Axx

[Dustin Keller]

As I mentioned in the meeting using the notation Axx can be
mis-leading especially in the case of DIS where azimuthal
control is not obvious.  However the relationship for
sigma^{+/-} for m=+1,-1 is sigma^{+/-}=sigma^u(1+(1/2)AzzPzz).
If you believe that then Axx=Azz, and the conclusion is the same.
If you call it Axx or Azz in either case you just measure the
ratio of polarized and unpolarized cross sections.  This will lead
to a target tensor polarization of about 10%.  There are certainly
other systematic concerns but this is the best we can do target wise.

dustin