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Top-quark mass measurement in the all-hadronic t t ¯ decay channel at √s = 8 TeV with the ATLAS detector

CollaborationWith : Ancu, Lucian Stefan / Bilbao De Mendizabal, Javier / Calace, Noemi / Chatterjee, Avishek / Clark, Allan Geoffrey / Coccaro, Andrea / Delitzsch, Chris Malena / Della Volpe, Domenico / Ferrere, Didier / Golling, Tobias / Gonzalez Sevilla, Sergio / Gramling, Johanna Léna / Guescini, Francesco / Iacobucci, Giuseppe / Katre, Akshay / Khoo, Teng Jian / Lanfermann, Marie Christine / Lionti, Anthony Eric / March Ruiz, Luis / Mermod, Philippe / Nackenhorst, Olaf / Nessi, Marzio / Paolozzi, Lorenzo / Ristic, Branislav / Schramm, Steven / Sfyrla, Anna / Wu, Xin
Published in Journal of High Energy Physics. 2017, vol. 1709, p. 118-159
Collection Open Access - SCOAP3
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 √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.
Keywords Hadron-Hadron scattering (experiments)Top physics
arXiv: 1702.07546
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ATLAS COLLABORATION. Top-quark mass measurement in the all-hadronic t t ¯ decay channel at √s = 8 TeV with the ATLAS detector. In: Journal of High Energy Physics, 2017, vol. 1709, p. 118-159. doi: 10.1007/JHEP09(2017)118 https://archive-ouverte.unige.ch/unige:97176

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Deposited on : 2017-10-02

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