Top-quark mass measurement in the all-hadronic $t\bar{t}$ decay channel at $\sqrt{s}$ = 8 TeV with the ATLAS detector

Abstract : The top-quark mass is measured in the all-hadronic top-antitop quark decay channel using proton-proton collisions at a centre-of-mass energy of $\sqrt{s}$ = 8 TeV with the ATLAS detector at the CERN Large Hadron Collider. The data set used in the analysis corresponds to an integrated luminosity of 20.2 fb$^{-1}$. The large multi-jet background is modelled using a data-driven method. The top-quark mass is obtained from template fits to the ratio of the three-jet to the dijet mass. The three-jet mass is obtained from the three jets assigned to the top quark decay. From these three jets the dijet mass is obtained using the two jets assigned to the W boson decay. The top-quark mass is measured to be 173.72 $\pm$ 0.55 (stat.) $\pm$ 1.01 (syst.) GeV.
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Submitted on : Wednesday, March 1, 2017 - 9:44:34 AM
Last modification on : Monday, October 22, 2018 - 9:42:01 AM

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M. Aaboud, N. Berger, M. Delmastro, L. Di Ciaccio, S. Elles, et al.. Top-quark mass measurement in the all-hadronic $t\bar{t}$ decay channel at $\sqrt{s}$ = 8 TeV with the ATLAS detector. Journal of High Energy Physics, Springer Verlag (Germany), 2017, 09, pp.118. ⟨10.1007/JHEP09(2017)118⟩. ⟨in2p3-01480071⟩

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