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Title
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Top-quark mass measurement from dilepton events at CDF II
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Author
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Institution/Organisation
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CDF Collaboration
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Abstract
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| We report a measurement of the top-quark mass using events collected by the CDF II detector from pp̅ collisions at √s=1.96 TeV at the Fermilab Tevatron. We calculate a likelihood function for the top-quark mass in events that are consistent with tt̅ →b̅ ℓ-ν̅ ℓbℓ′+νℓ′ 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-1 of integrated luminosity, yielding a top-quark mass Mt=165.2±6.1(stat)±3.4(syst) GeV/c2. This first application of a matrix-element technique to tt̅ →bℓ+νℓb̅ ℓ′-ν̅ ℓ′ decays gives the most precise single measurement of Mt in dilepton events. Combined with other CDF run II measurements using dilepton events, we measure Mt=167.9±5.2(stat)±3.7(syst) GeV/c2. |
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Language
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English
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Source (journal)
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Physical review letters. - New York, N.Y., 1958, currens
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Publication
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New York, N.Y.
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American Physical Society
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2006
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ISSN
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0031-9007
[print]
1079-7114
[online]
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Volume/pages
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96
:15
(2006)
, p. 1-7
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Article Reference
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152002
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ISI
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000236969700019
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (open access)
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