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Abstract:
The top quark is the most massive elementary particle known, and due to this, it has very special properties. The top quark is deeply related to the Higgs boson and it is expected to play a role in many models of physics beyond the standard model. The measurement of its properties is an important test of the consistency of the standard model.
During the Run-1 of the LHC, that ended in 2012, top quark physics started pushing the high precision regime. Within two months of the start of Run-2, in the summer of 2015, the first measurements of inclusive cross sections were made public, establishing the top quark as a standard model model candle at the LHC. With already more than 100 million of top quark pairs produced in collisions at 13TeV at each of the big experiments since then, the Run-2 of the LHC, set to end this year, has unlimited potential to explore the top sector.
During this talk, top physics at the LHC from the perspective of the CMS experiment will be discussed and motivated, and the latest Run-2 results will be presented. We are now in an era of differential measurements, key to understanding and improving the modelling of top quark processes and potentially sensitive to new physics phenomena. The CMS experiment also starts to be sensitive to low cross section processes, such as tt produced with vector bosons or Higgs bosons. By the end of this Run, we expect advances in all fronts in top quark physics, potentially shedding light on long standing questions in particle physics.