Measurement of masses in the t[bar over t] system by kinematic endpoints in pp collisions at s√=7 TeV
Author(s)
Apyan, Aram; Bauer, Gerry P; Busza, Wit; Cali, Ivan Amos; Dutta, Valentina; Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Klute, Markus; Lai, Yue Shi; Levin, Andrew Michael; Luckey Jr, P David; Ma, Teng; Nahn, Steven; Paus, Christoph M. E.; Ralph, Duncan Kelley; Roland, Christof E; Roland, Gunther M; Stephans, George S. F.; Stoeckli, Fabian; Sumorok, Konstanty C; Sung, Kevin Kai Hong; Velicanu, Dragos Alexandru; Wolf, Roger; Wyslouch, Boleslaw; Yang, Mingming; Yilmaz, Yetkin; Yoon, A. S.; Zanetti, Marco; Wyslouch, Victoria; Butz, Erik M.; Chan, M.; Kim, Y.; ... Show more Show less
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Alternative title
Measurement of masses in the tt¯ system by kinematic endpoints in pp collisions at s√=7 TeV
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Show full item recordAbstract
A simultaneous measurement of the top-quark, W-boson, and neutrino masses is reported for tt events selected in the dilepton final state from a data sample corresponding to an integrated luminosity of 5.0 fb[superscript −1] collected by the CMS experiment in pp collisions at √s = 7 TeV.
The analysis is based on endpoint determinations in kinematic distributions. When the neutrino and W-boson masses are constrained to their world-average values, a top-quark mass value of M[subscript t] = 173.9 ± 0.9 (stat.)[superscript +1.7] [subscript −2.1] (syst.) GeV is obtained. When such constraints are not used, the three particle masses are obtained in a simultaneous fit. In this unconstrained mode the study serves as a test of mass determination methods that may be used in beyond standard model physics scenarios where several masses in a decay chain may be unknown and undetected particles lead to underconstrained kinematics.
Date issued
2013-07Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear ScienceJournal
The European Physical Journal C
Publisher
Springer-Verlag
Citation
The CMS Collaboration et al. “Measurement of Masses in the t[bar over t] System by Kinematic Endpoints in Pp Collisions at √s = 7 TeV.” The European Physical Journal C 73.7 (2013): n. pag. © 2013 CERN for the benefit of the CMS collaboration
Version: Final published version
ISSN
1434-6044
1434-6052