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Abazov, et al","submitted_at":"2004-12-07T15:29:19Z","abstract_excerpt":"We present a measurement of the cross section for $Z$ production times the branching fraction to $\\tau$ leptons, $\\sigma \\cdot$Br$(Z\\to \\tau^+ \\tau^-)$, in $p \\bar p$ collisions at $\\sqrt{s}=$1.96 TeV in the channel in which one $\\tau$ decays into $\\mu \\nu_{\\mu} \\nu_{\\tau}$, and the other into $\\rm {hadrons} + \\nu_{\\tau}$ or $e \\nu_e \\nu_{\\tau}$.\n  The data sample corresponds to an integrated luminosity of 226 pb$^{-1}$ collected with the D{\\O}detector at the Fermilab Tevatron collider. 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