https://doi.org/10.1051/epjconf/20122812042
Measurement of the ttbar production cross section in the fully hadronic decay channel in pp collisions at 7 TeV
Università degli Studi di Firenze
a e-mail: antonio.tropiano@cern.ch
The first measurement of the top quark pair production cross section in the fully hadronic channel at a center-of-mass energy of √s = 7 TeV is presented. The measurement has been performed using an integrated luminosity of 1.09 fb−1, collected with the CMS detector. The reconstruction of the 
candidates is performed after a cut-based event selection using a kinematic fit. A data-driven technique is used to estimate the dominant background from QCD multijet production. The cross section is determined from a fit to the top quark mass. The cross section measurement yields σ() = 136 ±20(stat.) ±40(sys.) ±8(lumi.) pb. This result is consistent with an independent measurement in the same channel, with the measurements in other decay channels and with the Standard Model predictions.
© Owned by the authors, published by EDP Sciences, 2012
