Speaker
Description
The the Standard Model (SM) has shown a remarkable success describing processes observed at TeV scale at the LHC, including the experimental confirmation of a particle consistent with the SM Higgs boson by the ATLAS and CMS experiments.
However, there are still puzzling questions defying these accomplishments, such as the hierarchy problem, the matter-antimatter asymmetry, the origin of CP violation, among others. Many searches for physics beyond the SM that could provide an answer for these questions have been conducted at the LHC, both in the electroweak and strong sectors of the SM, with no indication of new physics so far. It may be possible that direct searches for new heavy particles are beyond the reach of the LHC energy, but since the LHC will be the highest energy collider for at least the next two decades, increased precision and new strategies for interpreting and modeling the LHC measurements when searching for new physics are needed. The ATLAS experiment is conducting a wealth of measurements in the charged and neutral current Drell-Yan processes, both inclusive and associated with heavy flavor production, aiming at very stringent tests of the SM. These include measurements of on-shell and off-shell vector bosons kinematics up to several TeV and in all three leptonic decay flavor channels; differential production cross-section measurements of H, W and Z bosons; and the investigation of multi-boson interactions via Vector Boson Scattering (VBS) and Vector Boson Fusion (VBF) production modes. These measurements need high integrated luminosities and extended coverage to populate the extreme regions of the phase space and hence the utmost precision is foreseen to be reached only during the High Luminosity LHC (HL-LHC) runs. However, the available ATLAS Run-2 data (139 fb$^{-1}$) combined with more than the doubled integrated luminosity ($\approx$ 300 $\mathrm{ fb}^{-1}$) expected in the forthcoming Run-3, provides already many opportunities (and challenges) to the experimental methods and theory models. We will discuss some of the on-going and planned precision SM analysis in ATLAS and show how these can be explored to foster the interaction between experiment and theory within the Brazilian High Energy Physics community.
