Break down of Optimum Energy Alg. Derived from MC Truth As it was for DC2 v9 version: Tracker & LastLayer replaced by LikeliHood Param the same Profile less Tracker+LastLayer more

All Methods 37% Profile & Parametric 24% LkHd & Parametric 21% Parametric Only 18% Mistracked (McZDir > -.2): 8% (BAD)

DC2: 4 Methods / Resolution Model 2  Cut at.3 CTBBestEnergyRatio < 5

Direct Comparison Method Cut at.2 BestEnergy2Ratio < 5

Resolution Model  Hi =.8 /  Low =1.5 Cut at.17 BestEnergyRatio < 5

Resolution Model  Hi = 1. /  Low =2. Cut at.2 BestEnergyRatio < 5

Direct Comparison Method 2: Only those reporting Cut at.17 BestEnergyRatio < 5

Energy resolutions when MC Truth is used to select Energy Method

26153 Evts. BestEnergyProb > Evts. BestEnergyProb>.30 DC2 Pass Evts. CTBGAM > Evts. CTBGAM >.5

Conclusions 1)DC2 and the new energy algs. Are essential equivalent 2)Opt. for using the new one mainly due to maintain-ability