Journal article
Measurement of masses in the tt¯ system by kinematic endpoints in pp collisions at s√=7 TeV
The European physical journal. C, Particles and fields, Vol.73(7), 2494
04/21/2013
DOI: 10.1140/epjc/s10052-013-2494-7
Abstract
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−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 Mt=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.
Details
- Title: Subtitle
- Measurement of masses in the tt¯ system by kinematic endpoints in pp collisions at s√=7 TeV
- Creators
- CMS Collaboration
- Contributors
- C. R Newsom (Contributor) - University of Iowa, Physics and AstronomyY Onel (Contributor) - University of Iowa, Physics and Astronomy
- Resource Type
- Journal article
- Publication Details
- The European physical journal. C, Particles and fields, Vol.73(7), 2494
- DOI
- 10.1140/epjc/s10052-013-2494-7
- NLM abbreviation
- Eur Phys J C Part Fields
- ISSN
- 1434-6044
- eISSN
- 1434-6052
- Publisher
- Springer
- Grant note
- 261323 / European Commission (ec__________::EC)
- Language
- English
- Date published
- 04/21/2013
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984199720802771
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