Before and after corrections

From: Eugene J. Geis (Eugene.Geis@asu.edu)
Date: Tue Jan 03 2006 - 14:01:40 EST


The plots show before and after plots of the ep-elastic over-determined kinematics. corr.ps has the
first four histograms described here:

theta_p - theta_p(theta_e) moved from a mean of -0.34 -> +0.09

theta_e - theta_e(theta_p) from -0.44 -? +0.11

Q2(theta_e) - Q2(theta_p) from -0.0045 -> +0.0011

Best improvement is obviously in momentum where in the final graph, there was a strong sector
dependence on the Q2(pe) - Q2(pp) value where the respective centers were at +0.047 and -0.037 and
now with no cuts on sector, the center is at +0.0025.

Mm.ps is a before/after shot of missing mass:

The missing mass improvement now peaks at 9 MeV as opposed to 16 MeV.

Again, the corrections should be added as such:

pe = pwl + PeLeft[ntl];
thetae = twl + TeLeft[ntl];

and the values are:

Float_t PeLeft[] = {0.0122,0.0131,0.0229,0.0209,0.0226,0.0229,
0.0238,0.0258,0.0247,0.0237,0.0219,0.0216,0.0230,0.0215,0.0193,0.0187};

Float_t PpLeft[] = {-0.0078,-0.0035,-0.0008,-0.0079,-0.0176,
-0.0179,-0.0162,-0.0207,-0.0249,-0.0284,-0.0280,-0.0255,-0.0269,
-0.0264,-0.0156,-0.0102};

Float_t PeRight[] = {-0.0152,-0.0159,-0.0169,-0.0150,-0.0138,
-0.0150,-0.0349,-0.0425,-0.0387,-0.0342,-0.0293,-0.0273,-0.0194,
-0.0121,-0.0120,-0.0127};

Float_t PpRight[] = {0.0401,0.0396,0.0419,0.0428,0.0400,0.0393,
0.0448,0.0476,0.0443,0.0453,0.0476,0.0512,0.0465,0.0414,0.0389,0.0346};

Float_t TeLeft[] = {0.3109,0.2367,0.6002,0.3758,0.3338,0.2095,
0.1210,0.0776,-0.1202,-0.2350,-0.3792,-0.5872,-0.6170,-0.7477,
-0.8057,0.1826};

Float_t TpLeft[] = {1.2124,0.8412,0.5218,0.8061,1.2637,1.1962,
0.9470, 1.0394,1.1992,1.1599,1.2609,1.2712,1.4409,1.4654,1.0485,0.7716};

Float_t TeRight[] = {-0.7944,-0.8158,-0.9546,-0.7797,-0.7888,
-0.8689,-1.7485,-1.9771,-1.6745,-1.3052,-1.2031,-1.1692,-0.9293,
-0.6885,-0.7704,-0.9981};

Float_t TpRight[] = {0.0474,0.1496,0.0141,0.1354,0.1477,0.3213,
0.5629,0.5377,0.3544,0.2760,0.2538,0.2099,0.1363,0.0845,0.1247,0.1422};







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