Comparison of Event Mixing performance vs POL2 fit on
Generated & Reconstructed MC and Data

DATA

Range: Egamma>300 MeV; Q2=1-4.1 GeV2; Nu=2.2-4.25 GeV; pT2=0-1.6 GeV2; z=0.2-1.
Selected bins: (9,9) 2D bins in (z,pT2) integrated over (Q2, Nu).

Fig.1a Inv. mass distribution in (z,pT2) bins for 6 targets, fitted if Nentries>200. Link to fit w/: Event Mixing , POL2

Fig.1b Ratio of Npi0(from mixing) / Npi0(from POL2) for each target. Ratio plotted vs Z in each pT2bin.
Left 2x3 - errors on Ratio are from the fit; Right 2x3 - errors are only statistical


Fig.2a Multiplicity Ratio in (z,pT2) bins extracted with: left -event mixing; right -pol2

Fig.2a Ratio of Multiplicity Ratios in (z,pT2): R(from event mixing)/R(from pol2)



RECONSTRUCTED MC

Fig. 3a Left Panel - Ratio of Acceptances (Fe/D) for three methods: pol2(green), mixing(blue), matching(red).
Right Panel - ratio of 'ratio of acceptances' extracted with mixing to extracted with pol2.


Fig. 3b Same as Fig.3a but bins with acceptnance below 0.5% are rejected.
Left-Ratio of Acc(Fe/D): pol2(green), mixing(blue), matching(red). Right-ratio of 'ratio of acceptances' mixing to pol2.





Fig.