Uncertainty Study

Uncertainty
Source of Error Estimated Value
Detector Effects
Momentum Resolution
Forward/Back Comparison
Backgrounds
Combinatoric
Cosmics
Fitting
Ratio Fits
Slope Fits1%
Theory
Model Comparison

Fitting Uncertainty

Ratio Fitting


A summary of the error derived by varying the ratio fits. The standard deviation of the statistical errors on the c parameter are calculated. The fits can be found here.
Fit Error
minbias
0 < y < 0.5		 0.00271
minbias
0.5 < y < 1.0		 0.00327
topology
0.1 < y < 0.5		 0.00917
topology
0.5 < y < 1.0		 0.0523

Slope Fits


A summary of the c parameters obtained by fixing the exponential slope parameter (k) in the overall fit to 100%, 90%, and 80% of its correct value. The fits can be found here.
Dataset 100% 90% 80%
minbias
0 < y < 0.5 		1.01 1.00 0.99
minbias
0.5 < y < 1.0		 0.92 0.91 0.91
topology
0.1 < y < 0.5		 0.83 0.83 0.87
topology
0.5 < y < 1.0 		1.04 1.04 1.10

Theory Comparison

Figure 1:

Comparison between STARlight and Hencken, Baur, Trautmann model.