Measurement of the top-quark mass in the all-hadronic channel using the full CDF data set

Aaltonen, T. and Amerio, S. and Amidei, D. and Anastassov, A. and Annovi, A. and Antos, J. and Apollinari, G. and Appel, J. A. and Arisawa, T. and Artikov, A. and Asaadi, J. and Ashmanskas, W. and Auerbach, B. and Aurisano, A. and Azfar, F. and Badgett, W. and Bae, T. and Barbaro-Galtieri, A. and Barnes, V. E. and Barnett, B. A. and Barria, P. and Bartos, P. and Bauce, M. and Bedeschi, F. and Behari, S. and Bellettini, G. and Bellinger, J. and Benjamin, D. and Beretvas, A. and Bhatti, A. and Nagai, Yoshikazu (2014) Measurement of the top-quark mass in the all-hadronic channel using the full CDF data set. PHYSICAL REVIEW D, 90 (9). ISSN 2470-0010

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Abstract

The top-quark mass Mtop is measured using top quark-antiquark pairs produced in protonantiproton collisions at a center-of-mass energy of 1.96 TeV and decaying into a fully hadronic final state. The full data set collected with the CDF II detector at the Fermilab Tevatron Collider, corresponding to an integrated luminosity of 9.3 fb−1 , is used. Events are selected that have six to eight jets, at least one of which is identified as having originated from a b quark. In addition, a multivariate algorithm, containing multiple kinematic variables as inputs, is used to discriminate signal events from background events due to QCD multijet production. Templates for the reconstructed top-quark mass are combined in a likelihood fit to measure Mtop with a simultaneous calibration of the jet-energy scale. A value of Mtop = 175.07 ± 1.19 (stat) +1.55 −1.58(syst) GeV/c 2 is obtained for the top-quark mass.

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