Measurement of vector boson production cross sections and their ratios using $pp$ collisions at $\sqrt{s}=13.6$ TeV with the ATLAS detector

Abstract

Fiducial and total $W^{\pm }$ 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 $W^{+}\to {\ell }^{+}\nu$, $W^{-}\to {\ell }^{-}\bar{\nu }$, and $Z\to {\ell }^{+}{\ell }^{-}$ ($\ell =e$ or $\mu$) boson productions are $4250\pm 150$ pb, $3310\pm 120$ pb, and $744\pm 20$ 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.

arXiv comment42 pages in total, author list starting page 25, 5 figures, 4 tables, published in Phys. Lett. B. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2023-16

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