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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

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arxiv 2310.04350 v2 pith:7NN2PL3M submitted 2023-10-06 hep-ex

ATLAS Collaboration This is my paper · ORCID
classification hep-ex
keywords measuredproductionatlasbosonscross-sectiondetectoreventslongitudinally
verification ladder T0 review T1 audit T2 compute T3 formal

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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 $2.45 \pm 0.60$ 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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Forward citations

Cited by 6 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Precise Standard-Model predictions for polarised Z-boson pair production and decay at the LHC

    hep-ph 2025-05 conditional novelty 7.0 of 10

    The authors deliver the first NNLO QCD plus NLO EW combination of predictions for polarised ZZ pairs at the LHC and validate them across five Monte Carlo codes and against ATLAS simulations.

  2. The Four Polarizations of the $W$ at High Energies

    hep-ph 2025-12 conditional novelty 6.0 of 10

    Polarization interference in intermediate W bosons is generically nonzero even on-shell, can exceed width-over-mass corrections at low energies, and is suppressed at LHC energies; a 2P scheme is proposed to reduce gau...

  3. Anomalous Couplings from the Electroweak Chiral Lagrangian for Off-Shell Higgs in $gg\to Z_L Z_L$

    hep-ph 2025-07 accept novelty 6.0 of 10

    In the electroweak chiral Lagrangian, off-shell Higgs contributions to gg to Z_L Z_L at leading order reduce to two independent combinations of the anomalous couplings c_t, c_V, and c_ggh.

  4. Proposed measurement of longitudinally polarised vector bosons in $WH$ and $ZH$ production at Hadron colliders

    hep-ph 2025-06 conditional novelty 6.0 of 10

    Simulation-based projections show longitudinally polarised W bosons in WH production could be measured at 5-sigma significance with 300 fb^-1 at the LHC.

  5. $CP$ violation in the $HZZ$ vertex and left-right asymmetries

    hep-ph 2025-01 conditional novelty 5.0 of 10

    Flavor-changing Z and Higgs couplings can induce CP-violating HZZ form factors up to about 10^-7, and a new asymmetry in Z* -> Z H is proposed to search for them.

  6. BSM: Extended Scalar Sectors

    hep-ph 2025-07 unverdicted novelty 1.0 of 10

    An updated review chapter on extended scalar sectors, their constraints, dark matter and CP violation links, and future collider searches.

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