Measurement of the W and Z cross section at 13.6 TeV with ATLAS

by Mihaela Marinescu (University of Birmingham)

Thursday 4 Jul 2024, 14:00 → 15:00 Europe/Ljubljana

C/0-C084 - F9 seminarska soba (Jamova)

Measurements the W and Z boson cross section provide important tests of the Standard Model, offering insights into the underlying dynamics of strongly interacting particles and proton structure. The large cross sections of these processes, together with clean experimental signatures achieved through their leptonic decays, allow for excellent experimental precision reaching the percent level, and in the case of cross-section ratios, the sub-percent level.  This talk presents the recent measurement of the W and Z boson cross sections, their ratios and the ratio of the ttbar and W boson fiducial cross sections, using proton-proton collision data obtained at the new centre-of-mass energy of 13.6 TeV by the ATLAS experiment. The data used in this measurement correspond to an integrated luminosity of 29 inverse fb and was collected in 2022, at the beginning of the Run-3 data-taking period. Finally, results are compared with state-of-the-art Standard Model theoretical predictions calculated using several different PDF sets.

Seminar Ljubljana 4 July 2024-1.pdf