Analysis Progress Update
9/24/2008

Working on problem of background neutrons

1) From last meeting -- I was to expand the q_perp range.  Jon suggested 
higher than .5GeV.  Unfortunantely, I saw nothing above .6GeV -- even when
combining many runs.  q_perp range for single hit quasi-elastic background 
ratio is now 0.3 to 0.6 GeV.  Also, expanded ND fiducial cuts (like last week, 
but with a larger x range).

2) Looked at neutral/charged ratio for a variety of TOF cut sizes at different 
times. (cut_location_wide.pdf)

3) Extracted the ratio for neutral/charged in the flat region (-50 to -20 ns) --
3.5, applied this to the number of events in the out of time region (20-10ns).

4) Result was a background that was 30% of the neutron events.

5) Upon further reflection (thanks Seamus), realized that this cannot be.  The 
goal is to subtract the neutral events that appear in the QE sample. A look at 
the neutral TOF spectrum sets an upper bound on neutral background at around 
15% (neutral_TOF.pdf)

6) suspect the issue is with choosing a TOF region too far from the QE peak.  
Currently looking for a closer flat region to use for n/c background.

Future (next week)
1) finish background n/c
2) nitrogen dilution

Longer term 
3) proton leakage
4) GEn extraction for kin. 4

Other issues:
1) post revised pion asymmetry
2) post nitrogen cell pressure for Jon (kin 2)