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High Energy Physics - Experiment

arXiv:1304.5783 (hep-ex)
[Submitted on 21 Apr 2013 (v1), last revised 29 Jul 2013 (this version, v2)]

Title:Measurement of masses in the t t-bar system by kinematic endpoints in pp collisions at sqrt(s) = 7 TeV

Authors:CMS Collaboration
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Abstract:A simultaneous measurement of the top-quark, W-boson, and neutrino masses is reported for t t-bar events selected in the dilepton final state from a data sample corresponding to an integrated luminosity of 5.0 inverse femtobarns collected by the CMS experiment in pp collisions at sqrt(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[t] = 173.9 +/- 0.9 (stat.) +1.7/-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.
Comments: Replaced with published version. Added journal reference and DOI
Subjects: High Energy Physics - Experiment (hep-ex)
Report number: CMS-TOP-11-027, CERN-PH-EP-2013-059
Cite as: arXiv:1304.5783 [hep-ex]
  (or arXiv:1304.5783v2 [hep-ex] for this version)
  https://doi.org/10.48550/arXiv.1304.5783
Journal reference: Eur. Phys. J. C 73 (2013) 2494
Related DOI: https://doi.org/10.1140/epjc/s10052-013-2494-7

Submission history

From: Cms Collaboration [view email]
[v1] Sun, 21 Apr 2013 19:21:58 UTC (2,196 KB)
[v2] Mon, 29 Jul 2013 17:31:17 UTC (2,197 KB)
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