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arXiv · 2405.02210

Pseudoscalar Higgs plus jet production at Next-to-Next-to-Leading Order in QCD

Youngjin Kim·Ciaran Williams
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Abstract

We present a calculation of pseudoscalar Higgs production in association with a jet at Next-to-Next-to Leading Order (NNLO) accuracy in QCD. We work in an effective field theory in which $m_t \rightarrow \infty$ resulting in effective operators which couple the pseudoscalar to gluons and (massless) quarks. We have calculated all of the relevant amplitudes for the two-loop, one-loop and tree-level contributions. As a cross-check of our calculation we have re-calculated all of the scalar Higgs plus parton amplitudes and perform a detailed comparison to the literature. In order to regulate the infra-red singularities present at this order we employ the $N-$jettiness slicing method. In addition to a detailed validation of our calculation at this order we investigate LHC phenomenology for a selection of pseudoscalar Higgs masses. Our results are implemented into the parton-level Monte Carlo code MCFM.

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Youngjin Kim, Ciaran Williams. 2024-05-03. Pseudoscalar Higgs plus jet production at Next-to-Next-to-Leading Order in QCD. https://arxiv.org/abs/2405.02210

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