We present the first direct measurement of the top-quark mass using tt¯ events decaying in the hadronic τ+jets decay channel. Using data corresponding to an integrated luminosity of 2.2 fb−1 collected by the CDF II detector in pp¯ collisions at √s=1.96 TeV at the Fermilab Tevatron, we measure the tt¯ cross section, σtt¯, and the top-quark mass, Mtop. We extract Mtop from a likelihood based on per-event probabilities calculated with leading-order signal and background matrix elements. We measure σtt¯=8.8±3.3(stat)±2.2(syst) pb and Mtop=172.7±9.3(stat)±3.7(syst) GeV/c2.
Measurements of the Top-Quark Mass and the tt¯ Cross Section in the Hadronic τ+jets Decay Channel at sqrt[s]=1.96 TeV
CAUZ, Diego;PAULETTA, Giovanni;SANTI, Lorenzo Gianni;
2012-01-01
Abstract
We present the first direct measurement of the top-quark mass using tt¯ events decaying in the hadronic τ+jets decay channel. Using data corresponding to an integrated luminosity of 2.2 fb−1 collected by the CDF II detector in pp¯ collisions at √s=1.96 TeV at the Fermilab Tevatron, we measure the tt¯ cross section, σtt¯, and the top-quark mass, Mtop. We extract Mtop from a likelihood based on per-event probabilities calculated with leading-order signal and background matrix elements. We measure σtt¯=8.8±3.3(stat)±2.2(syst) pb and Mtop=172.7±9.3(stat)±3.7(syst) GeV/c2.File in questo prodotto:
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