Hee status report
Genova team
July 11, 2000











Data/MC comparison at 73.5 inv pb (last run 111611)
 

Cut  Data  Tot  q qbar  l+l-  WWEX  eeqq  more 4F  2 phot 
Presel 366. 389.64± 2.31 243.95 5.80 125.71 8.08 2.84 3.26
Strong id. 58. 67.81± 1.14 23.92 2.65 33.13 5.68 1.42 1.01
Electr. energy 28. 28.51± 0.86 6.91 1.99 13.09 5.07 1.00 0.47
Fit prob. 12. 11.33± 0.65 2.64 1.31 2.75 3.84 0.48 0.31
Jet iso 3. 4.84± 0.13 0.22 0.00 0.44 3.57 0.38 0.23
Mass sel 1. 3.89± 0.12 0.16 0.00 0.31 2.97 0.22 0.23
B tag 1. 1.85± 0.06 0.08 0.00 0.07 1.50 0.21 0.00

 

Data/MC comparison at 93.7 inv pb (last run 112288) - data available on Friday
 
 

Cut  Data  Tot  q qbar  l+l-  WWEX  eeqq  more 4F  2 phot 
Presel 474. 496.34± 2.93 310.55 7.39 160.33 10.29 3.62 4.15
Strong id. 71. 86.36± 1.45 30.44 3.38 42.20 7.24 1.81 1.28
Electr. energy 34. 36.30± 1.10 8.80 2.53 16.66 6.45 1.27 0.59
Fit prob. 16. 14.41± 0.83 3.35 1.67 3.50 4.88 0.61 0.40
Jet iso 5. 6.15± 0.17 0.28 0.00 0.56 4.54 0.48 0.30
Mass sel 2. 4.94± 0.16 0.19 0.00 0.39 3.78 0.28 0.30
B tag 1. 2.35± 0.07 0.10 0.00 0.09 1.91 0.26 0.00

Data/MC comparison  plots

Signal efficiency: see  plot

 Updated Data/MC and efficiency tables     (corresponding to 96.8 inv pb, and btag>-1 instead of >-1.8)

Candidates:

 110167/11034  5C: Mjet=92.7 GeV, Mee=Mz, fit prob=23% , btag=-1.15 73.5 pb-1 sample
                        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
 

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