Update on Analysis Progress
Sept 09, 2008

1) Correctly chained together runs
2) Using proper charge identification for background (number of background events from TOF_background.pdf, charge ratio from qperp_ratio.pdf)

Current asymmetry results for Kin. 4:

Summary of Asymmetry
Total number of neutral events: 143990
Total neutral events -- background subtracted: 123740
Total number of neutral events, helicity +: 71778
Total number of neutral events, helicity -: 72212
Raw Asymmetry : -0.0496979
Background Subracted Asymmetry: -0.0561177 +/- 0.00283831 (5.05779% )
Number of Runs analyzed: 132
Nitrogen dilution factor: 0.943 <-- from Seamus' Thesis
Target polarization: 0.48
Beam polarization: 0.835
A_phys = -0.172648 <- Does not include proton leakage



Ongoing:
1) nitrogen dilution
2) rate dependence (needed for 1)

Upcoming:
3) proton leakage (requires 2)