Q2 from electron theta vs proton theta after new WC geometry

From: Christopher Crawford (chris2@lns.mit.edu)
Date: Wed Mar 15 2006 - 14:25:49 EST


Each plot is of "Q^2 from theta_e - Q^2 from theta_p" versus the
average Q^2

from thesis:



wc_q2res_orig.gif

after Jan recrunch:



q2res_recrunch.gif

after new WC geometry:



q2res_repos.gif

Note: I forgot and left the old cuts, hence all the extra white in
the top of the right plot.
The black lines show the bins used for my thesis data, and the blue
cross show finer averages.

It is a lot flatter (from +/-0.008 GeV^2 down to +/- 0.002 GeV^2),
and nicely centered around 0; however, there is overall slope still
present, which is opposite in each sector.

I plan to also repeat the 5x2 kinematic offsets plots, as well as to
re-extract the position of the middle wire chamber as a function of
theta from the latest recrunch (as in my Aug. geometry talk).
--Chris
_______________________________________

TA-53/MPF-1/D111 P-23 MS H803
LANL, Los Alamos, NM 87545
505-665-9804(o) 665-4121(f) 662-0639(h)
_______________________________________



This archive was generated by hypermail 2.1.2 : Mon Feb 24 2014 - 14:07:33 EST