Evidence of pair production of longitudinally polarised vector bosons and study of CP properties in ZZ → 4ℓ events with the ATLAS detector at $$ \sqrt{s} $$ = 13 TeV



Aad, G, Abbott, B, Abeling, K, Abicht, NJ, Abidi, SH, Aboulhorma, A, Abramowicz, H, Abreu, H, Abulaiti, Y, Acharya, BS
et al (show 2940 more authors) (2023) Evidence of pair production of longitudinally polarised vector bosons and study of CP properties in ZZ → 4ℓ events with the ATLAS detector at $$ \sqrt{s} $$ = 13 TeV. Journal of High Energy Physics, 2023 (12). 107-.

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Abstract

<jats:title>A<jats:sc>bstract</jats:sc> </jats:title><jats:p>A study of the polarisation and CP properties in <jats:italic>ZZ</jats:italic> production is presented. The used data set corresponds to an integrated luminosity of 140 fb<jats:sup><jats:italic>−</jats:italic>1</jats:sup> of proton-proton collisions at a centre-of-mass energy of 13 TeV recorded by the ATLAS detector at the Large Hadron Collider. The <jats:italic>ZZ</jats:italic> candidate events are reconstructed using two same-flavour opposite-charge electron or muon pairs. The production of two longitudinally polarised <jats:italic>Z</jats:italic> bosons is measured with a significance of 4.3 standard deviations, and its cross-section is measured in a fiducial phase space to be 2.45 ± 0.60 fb, consistent with the next-to-leading-order Standard Model prediction. The inclusive differential 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.</jats:p>

Item Type: Article
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 16 Feb 2024 09:30
Last Modified: 17 Mar 2024 19:17
DOI: 10.1007/jhep12(2023)107
Open Access URL: https://link.springer.com/article/10.1007/JHEP12(2...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3178712