Comparison of GEANT Simulation to Whitney Data

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Rates

Simulation	GEANT4(1cm target)	GEANT4(1cm target)	GEANT4(5cm target)	GEANT4(5cm target)	Whitney
Length of Target (cm)	1	1	5	5	5
[math]\displaystyle{ N_{incident} }[/math]	4E7	4E8	6E6	6E7	6E7
[math]\displaystyle{ N_{events} }[/math]	1026940	10270829		4826141	1001700
[math]\displaystyle{ N_{Moller} }[/math]	975593	9757288	732603	4584834	951138
[math]\displaystyle{ t_{simulated} }[/math] (s)	1.3E-5	1.3E-4		9.62E-5	9.54E-5
Event Cross-Section (b)	0.61	0.61		0.38	0.079
Total Moller Cross-Section (b)	0.58	0.58		0.361	0.075
Individual Moller Cross-Section (b)	5.95E-7	5.94E-8		7.87E-8	7.88E-8
Moller event rate per barn ([math]\displaystyle{ b^{-1} }[/math])	1.68E6	1.68E6		1.27E7	1.27E7

Total dectector events occur for about 2.5% of the incident electrons on a LH2 target. We can assume that the Moller rate is 95% of the total event rate. We can assume the number of Moller events that occur within the DC range to be around 30% of the total Moller events occuring for the number of incident electrons for LH2 as well. Since the differential cross-section over the angel theta is proportional to the differtial cross-section over wire number we can dividing the Moller differential cross-section by the product of the density and length of the target material

If we were to integrate the Moller Differential Cross Section