| ATLAS Note | |
| Report number | ATLAS-CONF-2023-038 |
| Title | Evidence of pair-production of longitudinally polarised vector bosons and study of CP properties in $ZZ \to 4\ell$ events with the ATLAS detector at $\sqrt{s} = 13$~TeV |
| Corporate Author(s) | The ATLAS collaboration |
| Collaboration | ATLAS Collaboration |
| Publication | 2023 |
| Imprint | 19 Jul 2023 |
| Number of pages | mult. |
| Note | All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/CONFNOTES/ATLAS-CONF-2023-038 |
| In: | The 31th International Symposium on Lepton-Photon Interactions at High Energies (Lepton Photon 2023), Melbourne, Victoria, Australia, 17 - 21 Jul 2023 |
| Subject category | Particle Physics - Experiment |
| Accelerator/Facility, Experiment | CERN LHC ; ATLAS |
| Free keywords | ZZ ; Polarisation ; CP ; EWEAK |
| Abstract | A study of the polarisation and CP properties in $ZZ$ production is presented. The used data set corresponds to an integrated luminosity of 140 fb$^{-1}$ of proton–proton collisions at a centre-of-mass energy of $13$ TeV recorded by the ATLAS detector at the Large Hadron Collider. The $ZZ$ candidate events are reconstructed using two same-flavour opposite-charge electron or muon pairs. The production of two longitudinally polarised $Z$ bosons is measured with a significance of $4.3$ standard deviations, and its cross-section is measured in a fiducial phase space to be $2.44 \pm 0.59$ fb, consistent with the next-to-leading order Standard Model prediction of $2.09 \pm 0.10$ fb. Differential cross-section of the inclusive $ZZ$ production as a function of a CP-sensitive angular observable is also measured. The results are used to constrain anomalous CP-odd neutral triple gauge couplings. |
| Related document | superseded by: CERN-EP-2023-199 |
Corresponding record in: Inspire
Record created 2023-07-19, last modified 2023-10-06
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