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Measurement of the top-quark mass in t[bar over t] events with dilepton final states in pp collisions at s√=7 TeV

Author(s)
Apyan, Aram; Bauer, Gerry P; Bendavid, Joshua L.; Busza, Wit; Cali, Ivan Amos; Chan, Matthew Hans; Dutta, Valentina; Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Hahn, Kristian Allan; Kim, Yongsun; Klute, Markus; Krajczar, Krisztian F.; Li, W.; Luckey Jr, P David; Ma, Teng; Nahn, Steven; Paus, Christoph M. E.; Ralph, Duncan Kelley; Roland, Christof E; Roland, Gunther M; Rudolph, Matthew Scott; Stephans, George S. F.; Stoeckli, Fabian; Sumorok, Konstanty C; Sung, Kevin Kai Hong; Velicanu, Dragos Alexandru; Wenger, Edward Allen; Wolf, Roger; Wyslouch, Boleslaw; Yang, Mingming; Yilmaz, Yetkin; Yoon, Andrew; Zanetti, Marco; ... Show more Show less
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Alternative title
Measurement of the top-quark mass in tt¯ events with dilepton final states in pp collisions at s√=7 TeV
Terms of use
Creative Commons Attribution 4.0 International License http://creativecommons.org/licenses/by/4.0/
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Abstract
The top-quark mass is measured in proton-proton collisions at s√=7 TeV using a data sample corresponding to an integrated luminosity of 5.0 fb[superscript −1] collected by the CMS experiment at the LHC. The measurement is performed in the dilepton decay channel t[bar over t]→(ℓ[superscript +]ν[subscript ℓ]b)(ℓ[superscript −][bar over ν][subscript ℓ][bar over b]), where ℓ=e,μ. Candidate top-quark decays are selected by requiring two leptons, at least two jets, and imbalance in transverse momentum. The mass is reconstructed with an analytical matrix weighting technique using distributions derived from simulated samples. Using a maximum-likelihood fit, the top-quark mass is determined to be 172.5±0.4 (stat.)±1.5 (syst.) GeV.
Date issued
2012-10
URI
http://hdl.handle.net/1721.1/105794
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
The European Physical Journal C
Publisher
Springer-Verlag
Citation
The CMS Collaboration et al. “Measurement of the Top-Quark Mass in t[bar over t] Events with Dilepton Final States in Pp Collisions at √s=7 TeV.” The European Physical Journal C 72.10 (2012): n. pag. © 2012 CERN for the benefit of the CMS collaboration
Version: Final published version
ISSN
1434-6044
1434-6052
Keywords
Springer-Verlag

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