Measurement of the t[bar over t] Production Cross Section in the All-Jet Final State in Pp Collisions at √s =7 TeV
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Author(s)
Chatrchyan, S.
Khachatryan, V.
Sirunyan, A. M
Tumasyan, A.
Adam, W.
Aguilo, E.
Bergauer, T.
Dragicevic, M.
Erö, J.
Fabjan, C.
Date Issued
May 2013
Journal
Journal of High Energy Physics
Publisher
Springer-Verlag
Citation
The CMS collaboration, et al. “Measurement of the t[bar over t] Production Cross Section in the All-Jet Final State in Pp Collisions at √s =7 TeV.” Journal of High Energy Physics, vol. 2013, no. 5, May 2013. © 2013 CERN for the benefit of the CMS collaboration
Version
Final published version
Abstract
A measurement is presented of the t[bar over t] production cross section (σ[subscript t[bar over t]]) in proton-proton collisions at a centre-of-mass energy of 7 TeV, in the all-jet final state that contains at least six jets, two of which are tagged as originating from b quarks. The data correspond to an integrated luminosity of 3.54 fb[superscript −1], collected with the CMS detector at the LHC. The cross section is determined through an unbinned maximum likelihood fit of background and t[bar over t] signal to the reconstructed mass spectrum of t[bar over t] candidates in the data, in which events are subjected to a kinematic fit assuming a t[bar over t]→W[superscript +]bW[superscript −][bar over b] →6 jets hypothesis. The measurement yields σ[subscript t[bar over t]] =139 ± 10(stat.) ± 26(syst.)±3 (lum.) pb, a result consistent with those obtained in other t[bar over t] decay channels, as well as with predictions of the standard model.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
http://dx.doi.org/10.1007/JHEP05(2013)065
