Measurement of vector boson production cross sections and their ratios using Collisions at TeV with the ATLAS detector

Fiducial and total ${W}^{±}$ and Z boson cross sections, their ratios and the ratio of top-antitop-quark pair and W-boson fiducial cross sections are measured in proton–proton collisions at a centre-of-mass energy of $\sqrt{s}=13.6$TeV, corresponding to an integrated luminosity of 29 fb$^{−1}$ of data collected in 2022 by the ATLAS experiment at the Large Hadron Collider. The measured fiducial cross-section values for ${W}^{+}\to {\ell }^{+}\nu $, ${W}^{-}\to {\ell }^{-}\overline{\nu }$, and $Z\to {\ell }^{+}{\ell }^{-}$ ($\ell =e$ or μ) boson productions are $4250±150$pb, $3310±120$pb, and $744±20$pb, respectively, where the uncertainty is the total uncertainty, including that arising from the luminosity of about 2.2%. The measurements are in agreement with Standard-Model predictions calculated at next-to-next-to-leading-order in ${\alpha }_{s}$, next-to-next-to-leading logarithmic accuracy and next-to-leading-order electroweak accuracy.