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

Preprint published in 2017 by Torsten Paul Ake Åkesson, Damián Άlvarez Piqueras, Barbro Åsman, Riccardo de Asmundis, Paul de Jong, Domenico della Volpe, Harry van der Graaf, Niels van Eldik, Peter van Gemmeren, Ivo van Vulpen, Marius Cornelis van Woerden, Hans von der Schmitt, Eckhard von Toerne, Kaven Henry Yau Wong, Jingbo Ye and other authors.
This paper was not found in any repository; the policy of its publisher is unknown or unclear.
This paper was not found in any repository; the policy of its publisher is unknown or unclear.

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Abstract

See paper for full list of authors - 39 pages in total, author list starting page 23, 6 figures, 4 tables, submitted to JHEP, All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2015-03/ ; 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 $±$ 0.55 (stat.) $±$ 1.01 (syst.) GeV.