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Scientific article
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English

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

ContributorsATLAS Collaboration
Published inThe journal of high energy physics, vol. 12, no. 12
Publication date2023
First online date2023-12-15
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 2.45 ± 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.

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Keywords
  • Electroweak Interaction
  • Hadron-Hadron Scattering
  • Vector Boson Production
  • P p: colliding beams
  • Z0: pair production
  • Z0: leptonic decay
  • Higher-order: 1
  • Coupling: gauge
  • Coupling: (3gauge boson)
  • Coupling: anomaly
  • Channel cross section: measured
  • Muon: pair production
  • P p: scattering
  • ATLAS
  • Polarization: longitudinal
  • Phase space
  • Electron: pair production
  • Z0: polarization
  • CERN LHC Coll
  • Vector boson: pair production
  • Differential cross section: measured
  • Angular dependence
  • Experimental results
  • 13000 GeV-cms
Citation (ISO format)
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 $ \sqrt{s} $ = 13 TeV. In: The journal of high energy physics, 2023, vol. 12, n° 12. doi: 10.1007/jhep12(2023)107
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Article (Published version)
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ISSN of the journal1029-8479
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