Measurement of the t anti-t Production Cross Section in p anti-p collisions at s**(1/2) = 1.96-TeV using Lepton + Jets Events with Jet Probability b-tagging Page: 28 of 45
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TABLE XVIII: Summary of the background estimate in the pretag sample. The difference between the total background
estimate and the observed number of events is due to W+light flavor and tt contributions.
Jet Multiplicity 1 jet 2 jets 3 jets > 4 jets
Electroweak
WW 127 9 123 9 10.0 0.8 3.6+0.3
WZ 16.8 1.2 18.8 1.4 1.7 0.1 0.61 0.06
ZZ 0.67 + 0.05 0.68 + 0.05 0.14 + 0.02 0.052 + 0.008
Single Top W - g 13.4 + 1.1 13.6 + 1.1 1.44 + 0.12 0.38 + 0.04
Single Top W* 4.0 0.4 7.9 0.7 1.02 0.10 0.24 0.02
Z-+ T+T- 87+7 16.5 1.7 1.0 0.3 0+0
Total 249 + 18 180 + 13 15.3 + 1.2 4.9 + 0.4
W + Heavy Flavor
Wbb 281 75 116 31 12.9 3.3 7.4 2.0
Wc 459 123 170 46 18.4 5.0 11.1 3.1
We 1197 252 243 53 16.9 3.6 9.1 2.0
Total 1938 + 322 530 + 94 47.8 + 9.0 27.5 + 5.5
Others
Non-W 1250 + 626 208 + 104 10.0 + 5.3 7.3 + 4.1
Total Background 3436 + 741 917 + 150 73 + 11 39.7 + 7.2
Data 29339 4442 300 166
TABLE XIX: Summary of the background estimate in the lepton+jets sample when a jet with Pi < 1% is required.
Jet Multiplicity 1 jet 2 jets 3 jets > 4 jets
Electroweak
WW 2.2 0.3 5.0 0.6 0.7 0.1 0.28 0.06
WZ 1.0 0.1 2.0 0.2 0.23 0.03 0.09 0.02
ZZ 0.027 + 0.006 0.09 + 0.01 0.012 + 0.004 0.007 + 0.002
Single Top W - g 4.1 + 0.5 4.9 + 0.6 0.73 0.08 0.20 + 0.02
Single Top W* 1.3 + 0.2 4.2 + 0.5 0.60 + 0.07 0.14 + 0.02
Z-+ T+T- 0.7 0.3 0.4 0.2 0.04 0.04 0 0
Total 9.3 + 1.1 16.6 + 1.8 2.3 + 0.3 0.71 + 0.09
W + Heavy Flavor
Wbb 83 23 47 13 6.0 1.6 3.3 0.9
Wc 31 9 17.5 5.2 2.3 0.7 1.2 0.4
We 86 21 19.2 5.0 1.4 0.4 0.6 0.2
Total 200 + 42 84 + 20 9.6 + 2.4 5.2 + 1.4
Others
Mistag 149 + 17 51.8 + 5.9 8.5 + 1.0 6.7 + 0.8
Non-W 31 16 8.6 4.6 0.9 0.6 0.5 0.5
Total Background 389 + 49 161 + 22 21.4 + 2.7 13.1 + 1.7
Data 350 191 52 68
tagging algorithm. We measure it using a PYTHIA measured using data. The acceptance is defined as
tt Monte Carlo sample generated with a top quark
mass mt = 178 GeV/c2 and simulated as discussed e = (Atr X Ke, X Etri X Ezo X ezvtz) x Eb-ta9
in Section III. Wherever possible, effects which are = Epretag x e (18)
not sufficiently well modeled in the simulation are - Ebta(
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Abulencia, A.; Acosta, D.; Adelman, Jahred A.; Affolder, T.; Akimoto, T.; Albrow, M.G. et al. Measurement of the t anti-t Production Cross Section in p anti-p collisions at s**(1/2) = 1.96-TeV using Lepton + Jets Events with Jet Probability b-tagging, article, July 1, 2006; Batavia, Illinois. (https://digital.library.unt.edu/ark:/67531/metadc884056/m1/28/: accessed May 8, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.