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Top flavour-changing neutral interactions: theoretical expectations and experimental detection

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arxiv hep-ph/0409342 v4 pith:EWOAE6BV submitted 2004-09-29 hep-ph

classification hep-ph
keywords interactionsextensionsflavour-changingneutralbosoncolliderdetectiondiscuss
verification ladder T0 review T1 audit T2 compute T3 formal

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Top flavour-changing neutral interactions with a light quark q=u,c and a gauge or Higgs boson are very suppressed within the Standard Model (SM), but can reach observable levels in many of its extensions. We review the possible size of the effective vertices Ztq, gamma tq, gtq and Htq in several SM extensions, and discuss the processes in which these interactions might show up at LHC and at a high energy e+ e- linear collider.

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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. Towards anomaly detection searches for new physics signatures including Higgs bosons with weakly supervised machine learning

    hep-ex 2026-07 conditional novelty 6.0 of 10

    HAXAD, a weakly supervised anomaly-detection search for Higgs-plus-X new physics, is extended with new embeddings and limit-setting, and on 470 fb^-1 of pseudo-data it matches or exceeds the best single cut-based limi...

  2. Targets for Flavor-Violating Top Decay

    hep-ph 2025-04 accept novelty 6.0 of 10

    In leptoquark-like new physics, rare top decays to quarks and electron/muon pairs are predicted to occur at branching ratios of about 10^-8 to 10^-6, putting some within reach of LHC searches.

  3. Search for flavour-changing neutral currents in processes with one top quark and a photon using 81 fb$^{-1}$ of $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS experiment

    hep-ex 2019-08 accept novelty 6.0 of 10

    ATLAS finds no evidence for tqγ flavour-changing neutral currents and sets the most stringent limits to date on the associated production cross sections and branching ratios.

  4. Counting b-jets at the FCC-ee as a probe of top-quark flavor physics

    hep-ph 2026-07 accept novelty 5.5 of 10

    FCC-ee at 240 GeV can probe Λ_eff ∼ 7–13 TeV for scalar, vector and tensor eetu/eetc operators by counting b_P-odd single-b-jet multi-jet events.

  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. Probing Anomalous $t{\bar q}Z$ Interactions at Muon Colliders

    hep-ph 2026-06 unverdicted novelty 4.0 of 10

    Muon colliders at 14 TeV with 20 ab^{-1} can set upper limits on BR(t → qZ) at O(10^{-8}), improving on CMS/ATLAS by 2-3 orders via polarized beams and fat-jet reconstruction.

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