We present the first direct measurement of the top-quark mass using tt̄ events decaying in the hadronic τ+jets decay channel. Using data corresponding to an integrated luminosity of 2.2fb -1 collected by the CDF II detector in pp̄ collisions at √s=1.96TeV at the Fermilab Tevatron, we measure the tt̄ cross section, σ tt̄, 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 σ tt̄=8. 8±3.3(stat)±2.2(syst)pb and M top=172.7±9.3(stat) ±3.7(syst)GeV/c2. © 2012 American Physical Society.

Measurements of the top-quark mass and the tt̄ cross section in the hadronic τ+jets decay channel at √s=1.96TeV

PAGLIARONE, Carmine Elvezio;PIACENTINO, Giovanni Maria;
2012-01-01

Abstract

We present the first direct measurement of the top-quark mass using tt̄ events decaying in the hadronic τ+jets decay channel. Using data corresponding to an integrated luminosity of 2.2fb -1 collected by the CDF II detector in pp̄ collisions at √s=1.96TeV at the Fermilab Tevatron, we measure the tt̄ cross section, σ tt̄, 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 σ tt̄=8. 8±3.3(stat)±2.2(syst)pb and M top=172.7±9.3(stat) ±3.7(syst)GeV/c2. © 2012 American Physical Society.
http://oai.aps.org/filefetch?identifier=10.1103/PhysRevLett.109.192001&component=fulltext&description=markup&format=xml
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11695/66887
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