Luminosity determination in $pp$ collisions at $\sqrt{s} = 13\;\mbox{TeV}$ using the ATLAS detector at the LHC

This poster describes the preliminary determination of the integrated luminosity for $pp$ collisions at $\sqrt{s} = 13\;\mbox{TeV}$ recorded by the ATLAS detector during Run 2 of the LHC in the years 2015-2018. The absolute luminosity scale was determined using van der Meer scans during dedicated running periods in each year, and extrapolated to the physics data-taking regime using complementary measurements from several luminosity-sensitive detectors. The total uncertainties on the integrated luminosities for each individual year of data-taking range from 2.0 to 2.4%, and are partially correlated between years. After typical data-quality selections, the full Run 2 $pp$ data sample corresponds to an integrated luminosity of 139 fb$^{-1}$, with an uncertainty of 1.7%.