Abstract
The latest advances in Standard Model measurements performed by the ATLAS experiment at the LHC are discussed. Vector-boson scattering processes have been observed in several final states (ZZ,WZ, same-signWW), and evidence has been reached in theZγfinal state. The experimental precision of QCD measurements has reached the same order as the theoretical uncertainties on the NNLO calculations. Evidence for the triboson WVV final state has been achieved. The latest results onV+jets,Zγ,W+W−and direct photons production are presented. New results on jet substructure and forward proton tagging program are also discussed.
Highlights
The Standard Model (SM) of particle physics has been successful at explaining and predicting all results obtained at collider experiments so far
Jet measurements are sensitive to the strong coupling and proton parton density functions (PDFs), and it is possible to explore the evolution of high energy quarks and gluons into hadrons
Since most of the diffraction kinematics is characterized by the soft scales, it can not be described by perturbative QCD (pQCD), and it is an important tool to probe the strong interaction in the non-perturbative regime
Summary
The Standard Model (SM) of particle physics has been successful at explaining and predicting all results obtained at collider experiments (and others) so far. Expectations of this theory have been confirmed many times with a high level of precision. This article reports the SM results from the ATLAS Collaboration that are available less than a year after the end of LHC Run 2. At this moment, ATLAS has published almost 200 SM-related papers [2]. The covered topics are: Electroweak Physics (single W and Z bosons, Dibosons/Tribosons, vector-boson fusion/scattering production), Direct photons, Jet Physics, Soft QCD, Diffraction and Forward Physics
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