Measurements of the top-quark mass and the tt¯ cross section in the hadronic τ + jets decay channel at √ s = 1.96 TeV
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Aaltonen, Timo Antero; Álvarez González, Bárbara; Casal Laraña, Bruno; Cuevas Maestro, Francisco Javier; Gómez Gramuglio, Gervasio; Palencia Cortezón, José Enrique; Rodrigo Anoro, Teresa; Ruiz Jimeno, Alberto; Scodellaro, Luca; Vila Álvarez, Iván; Vilar Cortabitarte, Rocío; Vizán García, Jesús ManuelFecha
2012-11Derechos
© 2012 American Physical Society
Publicado en
Physical Review Letters, 2012, 109(19), 192001
Editorial
American Physical Society
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Resumen/Abstract
We present the first direct measurement of the top-quark mass using t¯t 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 p¯p collisions at √s=1.96 TeV at the Fermilab Tevatron, we measure the t¯t cross section, σt¯t, 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 σt¯t=8.8±3.3(stat)±2.2(syst) pb and Mtop=172.7±9.3(stat)±3.7(syst) GeV/c2.
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