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P-wave contribution to third-order top-quark pair production near threshold

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arxiv 1312.4792 v1 pith:JYXN647K submitted 2013-12-17 hep-ph

classification hep-ph
keywords productionp-wavecontributionnearthresholdcollisionsfunctiongamma
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The next-to-leading order (NLO) P-wave Coulomb Green function contributes at third-order to top-pair production in e+ e- collisions near threshold. In this paper we compute the NLO P-wave Green function in dimensional regularization, as required for a consistent combination with non-resonant production of the W+ W- b\bar{b} final state, and present a phenomenological analysis of the P-wave contribution. We further briefly discuss squark production near threshold and top-pair production in gamma gamma collisions, where no S-wave contribution is present, and the P-wave thus constitutes the dominant production process.

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  1. Top quark mass effects in $gg\to ZZ$ at two loops and off-shell Higgs interference

    hep-ph 2019-08 conditional novelty 7.0 of 10

    New Padé approximants built from large-mass and threshold expansions give the two-loop top-quark mass dependence of the gg to ZZ box form factors relevant for off-shell Higgs interference.

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