A measurement of the top quark mass with a matrix element method
- Univ. of California, Berkeley, CA (United States)
The authors present a measurement of the mass of the top quark. The event sample is selected from proton-antiproton collisions, at 1.96 TeV center-of-mass energy, observed with the CDF detector at Fermilab's Tevatron. They consider a 318 pb-1 dataset collected between March 2002 and August 2004. They select events that contain one energetic lepton, large missing transverse energy, exactly four energetic jets, and at least one displaced vertex b tag. The analysis uses leading-order t$$\bar{t}$$ and background matrix elements along with parameterized parton showering to construct event-by-event likelihoods as a function of top quark mass. From the 63 events observed with the 318 pb-1 dataset they extract a top quark mass of 172.0 ± 2.6(stat) ± 3.3(syst) GeV/c2 from the joint likelihood. The mean expected statistical uncertainty is 3.2 GeV/c2 for m $$\bar{t}$$ = 178 GTeV/c2 and 3.1 GeV/c2 for m $$\bar{t}$$ = 172.5 GeV/c2. The systematic error is dominated by the uncertainty 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:
- 897576
- Report Number(s):
- FERMILAB-THESIS-2006-31; TRN: US0701530
- Country of Publication:
- United States
- Language:
- English
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