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Electroweak non-resonant NLO corrections to e+ e- -> W+ W- b bbar in the t tbar resonance region

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arxiv 1004.2188 v1 pith:3B36NPAQ submitted 2010-04-13 hep-ph

M. Beneke , B. Jantzen , P. Ruiz-Femenia (RWTH Aachen University) This is my paper · ORCID
classification hep-ph
keywords bbarcorrectionselectroweaknon-resonantproductionalphaanti-toparise
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We analyse subleading electroweak effects in the top anti-top resonance production region in e+ e- collisions which arise due to the decay of the top and anti-top quarks into the W+ W- b bbar final state. These are NLO corrections adopting the non-relativistic power counting v ~ alpha_s ~ sqrt(alpha_EW). In contrast to the QCD corrections which have been calculated (almost) up to NNNLO, the parametrically larger NLO electroweak contributions have not been completely known so far, but are mandatory for the required accuracy at a future linear collider. The missing parts of these NLO contributions arise from matching coefficients of non-resonant production-decay operators in unstable-particle effective theory which correspond to off-shell top production and decay and other non-resonant irreducible background processes to t tbar production. We consider the total cross section of the e+ e- -> W+ W- b bbar process and additionally implement cuts on the invariant masses of the W+ b and W- bbar pairs.

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Cited by 2 Pith papers

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  1. Toponia at the HL-LHC and FCC-ee

    hep-ph 2025-06 conditional novelty 6.0 of 10

    Toponium ηt and ψt states have promising discovery channels at HL-LHC (ηt b bbar, about 6σ) and FCC-ee (ψt interference in b bbar, about 14σ), while P-wave states remain out of reach.

  2. Invariant-mass distribution of top-quark pairs and top-quark mass determination

    hep-ph 2019-08 conditional novelty 6.0 of 10

    Resumming next-to-leading-power non-relativistic QCD corrections near the top-pair threshold raises the predicted cross section by about 9% and shifts the extracted top mass by about 1.5 GeV.

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