Measurement of the t$$\bar{t}$$ production cross section in p$$\bar{p}$$ collisions at √s= 1.96-TeV
- Harvard Univ., Cambridge, MA (United States)
We present the measurement of the t$$\bar{t}$$ cross section in the lepton plus jets channel with ≥ 1 and ≥ 2 secondary vertex tags. We use the scalar sum of transverse energies of the event (HT) to discriminate t{bar t} from the other backgrounds. We also use the transverse mass of the leptonic W-boson (M$$W\atop{T}$$) to further reduce the Non-W backgrounds. We use a combination of data and Monte Carlo to estimate the backgrounds from electroweak processes, single top, fake leptons, W+ Light Flavor fake tags, and real W+ Heavy Flavor production. We obtain a value of σ ≥1 = 8.7$$+0.9\atop{-0.9}$$(stat)$$+1.2\atop{-0.9}$$(sys) pb for the ≥1 tag cross section, and σ ≥2 = 8.7$$+1.8\atop{-1.6}$$(stat)$$+1.9\atop{-1.3}$$(sys) pb for the ≥2 tag cross section. The authors also present a measurement of the t$$\bar{t}$$ cross section by fitting the Njet spectrum. They combine the =1 and ≥2 tag cross sections to obtain σt$$\bar{t}$$ = 8.9$$+0.9\atop{-0.9}$$(stat)$$+1.4\atop{-1.3}$$(syst)pb.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-76CH03000
- OSTI ID:
- 879087
- Report Number(s):
- FERMILAB-THESIS--2005-72
- Country of Publication:
- United States
- Language:
- English
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