Search arXiv⌕ Search

arXiv · 2609.37919

One-loop QCD amplitudes for vector-boson-fusion Higgs-boson production to higher orders in $ε$

Abstract

We consider one-loop QCD corrections to Higgs-boson production via vector-boson fusion at hadron colliders. As an input for future exact NNLO computations, we derive the one-loop helicity amplitudes to higher orders in the dimensional regulator. We present a direct calculation of the amplitudes with spinor-helicity techniques and different $γ_5$ schemes. In addition, we compare this approach to a projector-based calculation. In order to derive analytical results to higher orders in $ε$, we calculate the pentagon master integrals by the method of $ε$-factorised differential equations and express them in terms of an algebraically independent set of basis functions.

Explore related subjects

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

Konstantin Asteriadis, Linus Götzfried, Andreas von Manteuffel. 2026-09-29. One-loop QCD amplitudes for vector-boson-fusion Higgs-boson production to higher orders in $ε$. https://arxiv.org/abs/2609.37919

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related papers

Charged lepton flavor violating decays $Z\to \ell_α\ell_β$ in the inverse seesaw

After confirmation of the massiveness and mixing of neutrinos, by neutrino oscillation data, the origin of neutrino mass and the occurrence of charged-lepton-flavor non-conservation in nature have become two main objectives for the physics of elementary particles. Taking inspiration from these two matters, we address the $Z$-boson lepton decays $Z\to\ell_α\ell_β$, with $\ell_α\ne\ell_β$, thus violating charged-lepton flavor. We calculate the set of contributing one-loop Feynman diagrams characterized by virtual neutral leptons, both light and heavy, emerged from the inverse seesaw mechanism for the generation of neutrino mass. We obtain general analytical results, which decouple in the limit as $Λ\to\infty$, with $Λ$ the high-energy scale involved in the inverse seesaw mechanism. Our quantitative analyses consider two scenarios of heavy-neutral-lepton mass: (1) the mass spectrum is degenerate; and (2) a more complete framework which includes both degenerate and non-degenerate mass spectra. The quantitative estimations we perform in both scenarios take into account upper bounds on non-unitarity deviations in the lepton mixing matrix and perturbativity of Yukawa couplings. We find that, even though current constraints on $Z\to\ell_α\ell_β$, by the ATLAS Collaboration, remain far from inverse-seesaw contributions, improved sensitivity from in-plans machines, such as the Future Circular Collider and the Circular Electron Positron Collider, shall be able to probe this mass-generating mechanism through the decay $Z\toτe$, whose contributions could be as large as $10^{-7}$.

hep-ph↗

Flux Estimates and Detection Prospects for Lunar Antineutrinos

The distribution of heat-producing elements (U, Th, K) within the Moon is critical for understanding its thermal evolution and formation history. Based on a refined lunar interior model, we calculate the lunar antineutrino fluxes from radioactive decays of these elements at two representative detector locations that bracket the expected signal intensity. The maximum flux is found to be slightly lower than the geoneutrino flux for the KamLAND site on Earth, while the minimum flux is approximately a factor of 9 lower than this maximum value. We also compute the expected event rates for lunar antineutrinos using three detection channels.

hep-ph↗

Unitarity bounds and sum rules in the SMEFT

We present a comprehensive reassessment of perturbative unitarity bounds in the dimension-six Standard Model Effective Field Theory, exploiting a new formalism based on spinor-helicity techniques to derive partial-wave unitarity bounds for generic $N \to M$ scattering amplitudes. We find that, in several cases, these theoretical constraints are already competitive with, or even stronger than, the corresponding experimental bounds for energy scales above a few TeV. This is especially the case for four-fermion operators under realistic flavor assumptions, where unitarity bounds can be further strengthened by exploiting sum rules. These results provide a valuable and timely contribution towards the ambitious program of new-physics searches with minimal theoretical priors supplemented by restrictive, yet general, first-principles criteria.

hep-ph↗