Removing Identified Z's from Data-Driven Background

Definitions of Z reco:  (tag as Z if 70<M<140).

    'Strict' Cuts:  compute invariant mass of all lepton candidates that pass all W algo cuts

    'Di-jet' Cuts:  compute invariant mass of all pairs of jets

    'Hybrid 1' Cuts:   compute invariant mass of

                                  Arm 1 = lepton candidates that pass all W algo cuts and

                                  Arm 2 = reconstructed jets 

    'Hybrid 2' Cuts:   compute invariant mass of

                                  Arm 1 = lepton candidates that pass all W algo cuts and

                                  Arm 2 = reconstructed jets containing a 2x2 BTOW cluster that carries > 50% of the jet Pt

Jan's private MC sample with correct beamline constraint

Figure 1:  Reconstructed jet pT distribution for Jan's private Z->ee MC sample

Figure 2:  Signed pT-Balance vs 2x2 cluster ET w/ current algo for PRL (from left to right Data, Z-<ee MC, and Z->Any MC)

Figure 3:  Signed pT-Balance vs 2x2 cluster ET remove Z's identified with 'di-jet cuts' (from left to right Data, Z-<ee MC, and Z->Any MC)

Figure 4:  Signed pT-Balance vs 2x2 cluster ET remove Z's identified with 'Hybrid 1 cuts' (from left to right Data, Z-<ee MC, and Z->Any MC)

Figure 4b:  Signed pT-Balance vs 2x2 cluster ET remove Z's identified with 'Hybrid 2 cuts' (from left to right Data, Z-<ee MC, and Z->Any MC)

Figure 4c:  Signed pT-Balance vs 2x2 cluster ET remove Z's identified with 'Strict cuts' (from left to right Data, Z-<ee MC, and Z->Any MC)

Table 1:  Amount of counts in Z sample above (signal region) and below (data-driven background region) sPtBalance cut.  The integrated lumininosity for the Z->ee (Z->any) sample is 243 (33) pb^-1 so scaling by 12/243=~0.05 (12/33=~0.36) gives the number of counts we should expect in the data.  The numbers in parentheses for the Z MC are scaled to 12 pb^-1.

Official RCF produced MC with wrong beamline constraint

Figure 5:  Jet pT distribution for official RCF Z->ee MC sample

Figure 6:  Signed pT-Balance vs 2x2 cluster ET w/ current algo for PRL (for Z (left), W+ (middle), and W- (right))

Figure 7:  Signed pT-Balance vs 2x2 cluster ET remove Z's identified with 'strict cuts' (for Z (left), W+ (middle), and W- (right))

Figure 8:  Signed pT-Balance vs 2x2 cluster ET remove Z's identified with 'di-jet cuts' (for Z (left), W+ (middle), and W- (right))

Table 2:  Amount of counts in Z sample above (signal region) and below (data-driven background region) sPtBalance cut