Title
Top-quark mass measurement from dilepton events at CDF II
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
New York, N.Y. ,
Subject
Physics
Source (journal)
Physical review letters. - New York, N.Y.
Volume/pages
96(2006) :15 , p. 152002,1-152002,7
ISSN
0031-9007
ISI
000236969700019
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
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.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/77e623/2f58cea3.pdf
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