We report a measurement of the top-quark mass using events collected by the CDF II detector from pp̄ collisions at s=1.96TeV at the Fermilab Tevatron. We calculate a likelihood function for the top-quark mass in events that are consistent with tt ̄ → b̄ - ν̄ b ′+ν ′ 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 340pb-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 tt ̄ →b +ν b ̄ ′-ν̄ ′ 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. © 2006 The American Physical Society.

Top-quark mass measurement from dilepton events at CDF II

Piacentino G.;
2006

Abstract

We report a measurement of the top-quark mass using events collected by the CDF II detector from pp̄ collisions at s=1.96TeV at the Fermilab Tevatron. We calculate a likelihood function for the top-quark mass in events that are consistent with tt ̄ → b̄ - ν̄ b ′+ν ′ 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 340pb-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 tt ̄ →b +ν b ̄ ′-ν̄ ′ 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. © 2006 The American Physical Society.
http://oai.aps.org/oai?verb=GetRecord&Identifier=oai:aps.org:PhysRevLett.96.152002&metadataPrefix=oai_apsmeta_2
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11695/88073
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