To show the agreement with Jim's analysis, the first plots show the x_F < 0 plots when Collins is plotted versus Z. These are shown for both p_T < 10 GeV/c (LEFT) and p_T > 10 GeV/c (RIGHT)

Figure 1: Collins asymmetry as a function of Z for x_F < 0. These are for both p_T < 10 GeV/c (LEFT) and p_T > 10 GeV/c (RIGHT)

Fitting these with a 0^th order polynomial, we have:

Binning yields in bins of x_F allows for plotting the asymmetry for forward and backward scattered jets with respect to the polarized beam on the same plot. For p_T > 10 GeV/c and p_T < 10 GeV/c are shown below

Figure 2: Collins asymmetry as a function of x_F for both p_T < 10 GeV/c (LEFT) and p_T > 10 GeV/c (RIGHT)

We are still trying to understand why the plot doesn't smoothly start to transition to zero for x_F < 0, rather it seems to increase and then start a trend toward zero. 

These can be split further into bins of z and jT. The bins I chose, which are purely experimental at this point and can be changed later, are:
0 < z < 0.2, 0.2 < z < 0.5, 0.5 < z < 1
0 < j_T < 0.375, 0.375 < j_T < 4.5

I will show these next time! The x_F bins need to be adjusted for the decreasing statistics at higher z and j_T. I will play with it this week to get a better set of plots, and I will also (finally) look at the eta bins that Jim has been looking at and give a double check on those numbers.