Scalar leptoquark contributions to the gg→ Zh process

2025/08/27 by He, Shi-Ping
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2508.19642

Abstract

In this manuscript, we study the general scalar leptoquark contributions to the gg→ Zh process at one-loop level. We find that the contributions only show up for the off-diagonal Higgs and Z boson interactions with scalar leptoquarks, which can lead to a new tensor structure different from the standard model. In the one-field and two-field models, the contributions vanish exactly; thus, the contributions are possible at least in the three-field models. We exemplify the contributions in the S₁+\widetildeR₂+S₃ model, which can appear in the presence of scalar leptoquark mass splittings and CP violation. In view of the heavy scalar leptoquark mass suppression, the leading contributions are typically small and difficult to observe at hadron colliders.

Citations

• Dimension-eight Operator Basis for Universal Standard Model Effective Field Theory
• Double Higgs production at the HL-LHC: probing a loop-enhanced model with kinematical distributions
• Oblique corrections from leptoquarks
• Dimension-8 Operators in the Standard Model Effective Field Theory
• Constraints on scalar and vector leptoquarks from the LHC Higgs data
• Higgs Physics at the HL-LHC and HE-LHC
• FeynRules 2.0 — A complete toolbox for tree-level phenomenology
• Theory and phenomenology of two-Higgs-doublet models

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