Hee status report
Genova team
September 11, 2000











Data/MC comparison at 171.9 inv pb
 

Cut  Data  Tot  q qbar  l+l-  WWEX  eeqq  more 4F  2 phot 
Presel 916. 908.25± 4.81 566.58 13.51 295.05 18.85 6.65 7.61
Strong id. 133. 158.35± 2.49 55.61 6.21 77.57 13.28 3.32 2.36
Electr. energy 62. 66.63± 1.92 16.05 4.63 30.69 11.83 2.34 1.09
Fit prob. 31. 26.21± 1.47 5.95 3.05 6.44 8.94 1.11 0.73
Jet iso 10. 11.19± 0.29 0.44 0.00 1.04 8.31 0.86 0.54
Mass sel 5. 8.98± 0.27 0.29 0.00 0.72 6.94 0.49 0.54
B tag 0. 2.76± 0.08 0.07 0.00 0.04 2.22 0.43 0.00

Analysis of new MC samples is being performed. Not yet included.
 
 

Data/MC comparison  plots

Signal efficiency: see  plot

 Updated Data/MC and efficiency tables     (corresponding to 171.9 inv pb, and btag>-1)
 
 
 
 

Candidates:

 110167/11034  5C: Mjet=92.7 GeV, Mee=Mz, fit prob=23% , btag=-1.15
                       4C: Mjet=92.5          Mee =91.5             14%
                        unfitted: recoil mass=93.7 GeV reco. jet mass=63.7 GeV Mee=87.4 GeV

 111886/551     5C: Mjet=110.3 GeV, Mee=Mz, fit prob=4.6%, btag=-2.96
 another view   Pzmiss=23.5 GeV: allowing ISR Mjet ~94 GeV (~ Mz) by Guennadi Borissov
                      4C: Mjet=107.8          Mee =93.5             2.5%
                       unfitted: recoil mass=109.5 GeV reco. jet mass=83.8 GeV Mee=91.8 GeV

 113145/1923   5C: Mjet=93.5 GeV, Mee=Mz, fit prob=20% , btag=-3.1
                       4C: Mjet=91.5          Mee =93.2             13%
                        unfitted: recoil mass=95.5 GeV reco. jet mass=75.5 GeV Mee=92.6 GeV

113675/2812   5C: Mjet=101.6 GeV, Mee=Mz, fit prob=19% , btag=-2.7
                       4C: Mjet=104.7          Mee =88.0             13%
                        unfitted: recoil mass=144.8 GeV reco. jet mass=89.4 GeV Mee=48.1 GeV

115244/10493  5C: Mjet=106.1 GeV, Mee=Mz,  btag=-10.
                        Fitted masses: M(ll) = 72.5 GeV; M(qq) = 104.4 GeV by Guennadi Borissov (FORWARD High Energy Electron).
                              4C: Mjet=127.3  Mee= 68.1    prob.=1.5%
                        unfitted: recoil mass=128.6 GeV reco. jet mass=64.4 GeV Mee=63.6 GeV

Rejected "candidate":

 111851/1811  Mjet=90.5 GeV, Mee=Mz, fit prob=83%, btag=-2.16
                   4C: Mjet=94.2          Mee =86.3             87%
                      unfitted: recoil mass=99.4 GeV reco. jet mass=80.5 GeV Mee=84.7 GeV

              Rejected by anti-Bhabha cut
              Could be kept if Bhabha rejection applied only to low multiplicity

No interesting  candidate so far, just ZZ events