Measurement of the mass difference between top and antitop quarks

5th International Workshop on Top Quark Physics

Blyweert, S.^1

Inter-university Institute for High Energies, Vrije Universiteit Brussel, Brussels, Belgium^1

关键词: CMS detectors;    CPT invariance;    Final state;    Integrated luminosity;    Mass difference;    Measured values;    Top quarks;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/452/1/012044/pdf
DOI  :  10.1088/1742-6596/452/1/012044

来源: IOP

【 摘 要 】

A measurement of the mass difference between the top quark and the antitop quark (Δmt mt - m) is performed using events with a muon or an electron and at least four jets in the final state. Data collected in 2011 with the CMS detector at the LHC and corresponding to an integrated luminosity of 4.96 ± 0.11 fb-1are analyzed. The measured value of Δmt -0.44 ± 0.46 (stat.) ± 0.27 (syst.) GeV is consistent with the expectation of CPT invariance, and provides a significantly improved precision relative to existing measurements.