We present the first direct measurement of the top-quark mass using t (t) over bar events decaying in the hadronic tau + jets decay channel. Using data corresponding to an integrated luminosity of 2.2 fb(-1) collected by the CDF II detector in p (p) over bar collisions at root s = 1.96 TeV at the Fermilab Tevatron, we measure the t (t) over bar cross section, sigma(t (t) over bar), and the top-quark mass, M-top. We extract M-top from a likelihood based on per-event probabilities calculated with leading-order signal and background matrix elements. We measure sigma(t (t) over bar) = 8.8 +/- 3.3(stat) +/-2.2(syst) pb and M-top = 172.7 +/- 9.3(stat) +/- 3.7(syst) GeV/c(2).

Measurements of the Top-Quark Mass and the t(t)over-bar Cross Section in the Hadronic tau plus jets Decay Channel at root s=1.96 TeV

MORELLO, MICHAEL JOSEPH;
2012

Abstract

We present the first direct measurement of the top-quark mass using t (t) over bar events decaying in the hadronic tau + jets decay channel. Using data corresponding to an integrated luminosity of 2.2 fb(-1) collected by the CDF II detector in p (p) over bar collisions at root s = 1.96 TeV at the Fermilab Tevatron, we measure the t (t) over bar cross section, sigma(t (t) over bar), and the top-quark mass, M-top. We extract M-top from a likelihood based on per-event probabilities calculated with leading-order signal and background matrix elements. We measure sigma(t (t) over bar) = 8.8 +/- 3.3(stat) +/-2.2(syst) pb and M-top = 172.7 +/- 9.3(stat) +/- 3.7(syst) GeV/c(2).
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11384/38429
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