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Exact two-loop amplitudes for Higgs plus jet production with a cubic Higgs self-coupling

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arxiv 2408.13186 v2 pith:LQ77ZB2E submitted 2024-08-23 hep-ph hep-ex

classification hep-phhep-ex
keywords higgsamplitudescorrectionscubicproductionself-couplingexactmomentum
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We compute the corrections to the two-loop amplitudes for $gg \to h$, $gg \to hg$, $qg \to hq$, and $q \bar q \to hg$ due to a modified cubic Higgs self-coupling. The exact dependence on the Higgs and top-quark masses across the entire $2 \to 2$ phase space is determined by numerically solving a system of differential equations for the relevant master integrals. The calculated amplitudes are crucial for evaluating the impact of the considered corrections on exclusive $pp \to hj$ production at the hadronic event level. As an application, we calculate the non-universal, kinematic-dependent cubic Higgs self-coupling corrections to the Higgs-boson transverse momentum distribution in gluon-gluon fusion Higgs production for arbitrary values of the transverse momentum.

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Cited by 3 Pith papers

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

  1. A new probe of the quartic Higgs self-coupling

    hep-ph 2025-05 conditional novelty 7.0 of 10

    A two-loop calculation of the Higgs wave-function renormalization opens a new, indirect probe of the quartic Higgs self-coupling through single-Higgs production at the FCC.

  2. First look at the evaluation of two-loop Feynman integrals for radiative return processes

    hep-ph 2026-07 accept novelty 6.0 of 10

    Planar two-loop four-point master integrals for massive radiative-return QED, including elliptic and nested-root sectors, are reduced to polynomial-in-ε differential equations that evaluate stably in the physical region.

  3. Fast evaluation of Feynman integrals for Monte Carlo generators

    hep-ph 2025-07 conditional novelty 6.0 of 10

    A new numerical integrator evaluates one- and two-loop five-point Feynman integrals with complex masses in milliseconds, using variable-by-variable integration and a new branch-cut prescription.

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