Measurement of the top-quark mass in the fully hadronic decay channel from ATLAS data at âˆšs=7 TeV

G Aad; R Aben; I Angelozzi; L.J Beemster; S Bentvelsen; D Berge; G.J Bobbink; K Bos; H Boterenbrood; P Butti; A Castelli; A.P Colijn; P de Jong; L de Nooij; I Deigaard; C Deluca; P.O Deviveiros; S Dhaliwal; P Ferrari; S Gadatsch; D.A.A Geerts; F Hartjes; N.P Hessey; N Hod; O Igonkina; P Kluit; E Koffeman; H Lee; F Linde; J Mahlstedt; J Mechnich; K.P Oussoren; P Pani; D Salek; N Valencic; W van den Wollenberg; P.C van der Deijl; R van der Geer; H van der Graaf; R van der Leeuw; I van Vulpen; W Verkerke; J.C Vermeulen; M Vranjes Milosavljevic; M Vreeswijk; H Weits; ATLAS Collaboration

doi:10.1140/epjc/s10052-015-3373-1

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Measurement of the top-quark mass in the fully hadronic decay channel from ATLAS data at âˆšs=7 TeV

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Measurement of the top-quark mass in the fully hadronic decay channel from ATLAS data at âˆšs=7 TeV

G Aad, R Aben, I Angelozzi, L.J Beemster, S Bentvelsen, D Berge, G.J Bobbink, K Bos, H Boterenbrood, P Butti, …

The European physical journal. C, Particles and fields, Vol.75(4), 158

2015

DOI: 10.1140/epjc/s10052-015-3373-1

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Abstract

The mass of the top quark is measured in a data set corresponding to 4.6 fb −1 of proton-proton collisions with centre-of-mass energy √s=7 TeV collected by the ATLAS detector at the LHC. Events consistent with hadronic decays of top-antitop quark pairs with at least six jets in the final state are selected. The substantial background from multijet production is modelled with data-driven methods that utilise the number of identified b-quark jets and the transverse momentum of the sixth leading jet, which have minimal correlation. The top-quark mass is obtained from template fits to the ratio of three-jet to dijet mass. The three-jet mass is calculated from the three jets produced in a top-quark decay. Using these three jets the dijet mass is obtained from the two jets produced in the W boson decay. The top-quark mass obtained from this fit is thus less sensitive to the uncertainty in the energy measurement of the jets. A binned likelihood fit yields a top-quark mass of mt=175.1±1.4(stat.) ±1.2(syst.) GeV.

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Title: Subtitle: Measurement of the top-quark mass in the fully hadronic decay channel from ATLAS data at âˆšs=7 TeV
Creators: G Aad - Aix-Marseille Université
R Aben - University of Amsterdam
I Angelozzi - University of Amsterdam
L.J Beemster - University of Amsterdam
S Bentvelsen - University of Amsterdam
D Berge - University of Amsterdam
G.J Bobbink - University of Amsterdam
K Bos - University of Amsterdam
H Boterenbrood - University of Amsterdam
P Butti - University of Amsterdam
A Castelli - University of Amsterdam
A.P Colijn
P de Jong
L de Nooij
I Deigaard
C Deluca
P.O Deviveiros
S Dhaliwal
P Ferrari
S Gadatsch
D.A.A Geerts
F Hartjes
N.P Hessey
N Hod
O Igonkina
P Kluit
E Koffeman
H Lee
F Linde
J Mahlstedt
J Mechnich
K.P Oussoren
P Pani
D Salek
N Valencic
W van den Wollenberg
P.C van der Deijl
R van der Geer
H van der Graaf
R van der Leeuw
I van Vulpen
W Verkerke
J.C Vermeulen
M Vranjes Milosavljevic
M Vreeswijk
H Weits
ATLAS Collaboration
Contributors: U Mallik (Contributor) - University of Iowa, Physics and Astronomy
Resource Type: Journal article
Publication Details: The European physical journal. C, Particles and fields, Vol.75(4), 158
DOI: 10.1140/epjc/s10052-015-3373-1
NLM abbreviation: Eur Phys J C Part Fields
ISSN: 1434-6044
eISSN: 1434-6052
Publisher: Springer
Language: English
Date published: 2015
Academic Unit: Physics and Astronomy
Record Identifier: 9984200053402771

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