Evidence of pair production of longitudinally polarised vector bosons and study of CP properties in ZZ → 4ℓ events with the ATLAS detector at square root of s = 13 TeV

Authors

The ATLAS collaboration

Publication Date

2023

Journal or Book Title

Journal of High Energy Physics

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-favour opposite-charge electron or muon pairs. The production of two longitudinally polarised Z bosons is measured with a signifcance of 4.3 standard deviations, and its cross-section is measured in a fducial phase space to be 2.45 ± 0.60 fb, consistent with the next-to-leadingorder Standard Model prediction. The inclusive diferential cross-section 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

DOI

https://doi.org/10.1007/JHEP12(2023)107

Issue

12

License

UMass Amherst Open Access Policy

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 License.

Recommended Citation

The ATLAS collaboration, "Evidence of pair production of longitudinally polarised vector bosons and study of CP properties in ZZ → 4ℓ events with the ATLAS detector at square root of s = 13 TeV" (2023). Journal of High Energy Physics. 1297.
https://doi.org/10.1007/JHEP12(2023)107