Top-Quark Mass Measurement from Dilepton Events at CDF II
- University of Illinois, Urbana, Illinois 61801 (United States)
- University of Florida, Gainesville, Florida 32611 (United States)
We report a measurement of the top-quark mass using events collected by the CDF II detector from pp collisions at {radical}(s)=1.96 TeV at the Fermilab Tevatron. We calculate a likelihood function for the top-quark mass in events that are consistent with tt{yields}bl{sup -}{nu}{sub l}bl{sup '+}{nu}{sub l}{sup '} decays. The likelihood is formed as the convolution of the leading-order matrix element and detector resolution functions. The joint likelihood is the product of likelihoods for each of 33 events collected in 340 pb{sup -1} of integrated luminosity, yielding a top-quark mass M{sub t}=165.2{+-}6.1(stat){+-}3.4(syst) GeV/c{sup 2}. This first application of a matrix-element technique to tt{yields}bl{sup +}{nu}{sub l}bl{sup '-}{nu}{sub l{sup '}} decays gives the most precise single measurement of M{sub t} in dilepton events. Combined with other CDF run II measurements using dilepton events, we measure M{sub t}=167.9{+-}5.2(stat){+-}3.7(syst) GeV/c{sup 2}.
- OSTI ID:
- 20775173
- Journal Information:
- Physical Review Letters, Vol. 96, Issue 15; Other Information: DOI: 10.1103/PhysRevLett.96.152002; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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