Record link: 
http://hdl.handle.net/20.500.12708/164521
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Title: 
Measurement of the mass difference between top and antitop quarks
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Citation: 
Bergauer, T., Fabjan, C., Friedl, M., Frühwirth, R., Jeitler, M., Krammer, M., Wulz, C.-E., & CMS Collaboration. (2012). Measurement of the mass difference between top and antitop quarks. Journal of High Energy Physics, 2012(6), Article 109. https://doi.org/10.1007/jhep06(2012)109
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Publisher DOI: 
10.1007/jhep06(2012)109
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Publication Type: 
Article - Original Research Article
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Language: 
English
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Authors: 
Bergauer, Thomas 
Fabjan, Christian 
Friedl, Markus 
Frühwirth, Rudolf 
Jeitler, Manfred 
Krammer, Manfred 
Wulz, Claudia-Elisabeth 
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Author Collaboration: 
CMS Collaboration
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Journal: 
Journal of High Energy Physics 
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ISSN: 
1029-8479
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Date (published): 
Jun-2012
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Number of Pages: 
36
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Publisher: 
SPRINGER
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Peer reviewed: 
Yes
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Keywords: 
Nuclear and High Energy Physics; Hadron-Hadron Scattering; quarks
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Abstract: 
A measurement of the mass difference between the top and the antitop quark (∆mₜ = mₜ − mₜ̵) is performed using events with a muon or an electron and at least four jets in the final state. The analysis is based on data collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 4.96±0.11 fb⁻¹, and yields the value of ∆mₜ = −0.44±0.46 (stat.)±0.27 (syst.) GeV. This result is consistent with equality of particle and antiparticle masses required by CPT invariance, and provides a significantly improved precision relative to existing measurements.
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Research Areas: 
Quantum Modelling and Simulation: 30%
außerhalb der gesamtuniversitären Forschungsschwerpunkte: 70%
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Science Branch: 
Physik, Mechanik, Astronomie
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