A precise measurement of the top quark mass
- Univ. of California, Los Angeles, CA (United States)
We present a measurement of the mass of the top quark using data from proton-antiproton collisions recorded at the CDF experiment in Run II of the Fermilab Tevatron. Events are selected from the single lepton plus jets final state (t$$\bar{t}$$ → W+bW-$$\bar{b}$$ → ℓvbq$$\bar{q}$$'$$\bar{b}$$). The top quark mass is extracted using a calculation of the probability density for a t$$\bar{t}$$ final state to resemble a data event. This probability density is a function of both top quark mass and energy scale of calorimeter jets, constrained in situ with the hadronic W boson mass. Using 167 events observed in 955 pb-1 integrated luminosity, we achieve the single most precise measurement of top quark mass to date of 170.8 ± 2.2 (stat.) ± 1.4 (syst.) GeV/c2, where the quoted statistical uncertainty includes uncertainty from the determination of the jet energy scale.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 902873
- Report Number(s):
- FERMILAB-THESIS--2007-05
- Country of Publication:
- United States
- Language:
- English
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