New physics in the ZZh vertex: one-loop contributions from a radiative seesaw model
- 1Benemérita Universidad Autónoma de Puebla
- 2Centro de Investigación y de Estudios Avanzados del IPN
Abstract
A bstract : Precision Higgs physics offers a sensitive window into physics beyond the Standard Model. In parallel, neutrino-oscillation experiments have established the existence of nonzero neutrino masses, thus implying the presence of new physics. Motivated by these facts, we investigate the one-loop contributions of light and heavy Majorana neutrinos to the ZZh vertex within a variant of the type-I seesaw mechanism in which light-neutrino masses vanish at tree level and are then generated radiatively. We analyze the CP -conserving and CP -violating anomalous couplings which characterize the ZZh vertex and study their phenomenological implications in two relevant kinematic scenarios at future lepton colliders: Higgsstrahlung production and Higgs production via neutral-current vector-boson fusion. We find that CP -conserving effects can reach magnitudes of order 10 ⁻³ , potentially within projected future experimental sensitivities, whereas CP -violating contributions are strongly suppressed, lying well beyond such projections.
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BibTeX
@article{novalessanchez2026physics,
title = {{New physics in the ZZh vertex: one-loop contributions from a radiative seesaw model}},
author = {Héctor Novales-Sánchez and Humberto Vázquez-Castro and Mónica Salinas},
journal = {Journal of High Energy Physics},
year = {2026},
month = oct,
doi = {10.1007/jhep10(2026)018},
url = {https://link.springer.com/10.1007/JHEP10(2026)018},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - New physics in the ZZh vertex: one-loop contributions from a radiative seesaw model
AU - Héctor Novales-Sánchez
AU - Humberto Vázquez-Castro
AU - Mónica Salinas
PY - 2026
DA - 2026/10/01
JO - Journal of High Energy Physics
DO - 10.1007/jhep10(2026)018
UR - https://link.springer.com/10.1007/JHEP10(2026)018
AB - A bstract : Precision Higgs physics offers a sensitive window into physics beyond the Standard Model. In parallel, neutrino-oscillation experiments have established the existence of nonzero neutrino masses, thus implying the presence of new physics. Motivated by these facts, we investigate the one-loop contributions of light and heavy Majorana neutrinos to the ZZh vertex within a variant of the type-I seesaw mechanism in which light-neutrino masses vanish at tree level and are then generated radiatively. We analyze the CP -conserving and CP -violating anomalous couplings which characterize the ZZh vertex and study their phenomenological implications in two relevant kinematic scenarios at future lepton colliders: Higgsstrahlung production and Higgs production via neutral-current vector-boson fusion. We find that CP -conserving effects can reach magnitudes of order 10 ⁻³ , potentially within projected future experimental sensitivities, whereas CP -violating contributions are strongly suppressed, lying well beyond such projections.
SN - 1029-8479
ER -