Precision measurements in the top quark sector with the CMS experiment at the LHC

3rd Symposium on Prospects in the Physics of Discrete Symmetries

Da Silva, Pedro Ferreira^1

CERN, Genève, Switzerland^1

关键词: Measurements of;    Pair production;    Precise determinations;    Precision measurement;    Production cross section;    Strong coupling;    Top quarks;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/447/1/012033/pdf
DOI  :  10.1088/1742-6596/447/1/012033

来源: IOP

【 摘 要 】

A review of the measurements of the t production cross section (inclusive and differential) performed by the CMS experiment at the LHC is given. The results are used to constrain the magnitude of most of the relevant systematics affecting precision measurements in the top quark sector. In addition from the determination of the top quark pair production cross section it is possible to determine the strong coupling constant as αS(mZ) = 0.1178+0.0046-0.0040 in agreement with the current world average. After the combination of several channels and techniques explored to measure the top quark mass in data, a precise determination of this quantity is made at CMS: mt = 173.4±0.4stat ± 0.9syst GeV. The measurement of the difference Δmt mt - m is also presented.