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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
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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Cited by 4 Pith papers

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

  1. 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...

  2. 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.

  3. 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.

  4. 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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