Scalar leptoquark contributions to the $gg\to Zh$ process

Abstract

In this manuscript, we study the general scalar leptoquark contributions to the $gg\to Zh$ 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 new tensor structures 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 $S_1+{\tilde{R}}_2+S_3$ 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. However, this work offers a quantitative and systematic investigation of scalar leptoquark contributions, also making it valuable for the new physics studies in other models.

43 pages, 4 captioned figures, 1 table. Match the published version in Physical Review D. Enhance the motivation and improve the presentation. Expand more details on Jarlskog-like invariants. Add analyses from the SMEFT operators. Gain numerical discussions. Suggestions and comments are welcome

References in corpus (20)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• A portrait of the Higgs boson by the CMS experiment ten years after the discovery
• Flavor Changing Neutral Currents, an Extended Scalar Sector, and the Higgs Production Rate at the LHC
• What's in the Loop? The Anatomy of Double Higgs Production
• Color Sextet Scalars at the CERN Large Hadron Collider
• $ZH$ production in gluon fusion: two-loop amplitudes with full top quark mass dependence
• Higgs Uncovering Light Scalar Remnants of High Scale Matter Unification
• Virtual corrections to $gg\to ZH$ in the high-energy and large-$m_t$ limits
• On the NLO QCD Corrections to Gluon-Initiated ZH Production
• A leptoquark and vector-like quark extended model for the simultaneous explanation of the $W$ boson mass and muon $g-2$ anomalies
• Characterising the Higgs boson with ATLAS data from Run 2 of the LHC
• Leptoquark-assisted Singlet-mediated Di-Higgs Production at the LHC
• Primary Observables for Indirect Searches at Colliders
• Diboson production in the SMEFT from gluon fusion
• Combination of searches for pair-produced leptoquarks at $\sqrt{s}=13$ TeV with the ATLAS detector
• Leptoquark and vector-like quark extended models as the explanation of the muon $g-2$ anomaly
• Dimension-eight Operator Basis for Universal Standard Model Effective Field Theory
• Search for pair production of scalar and vector leptoquarks decaying to muons and bottom quarks in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Scalar leptoquark and vector-like quark extended models as the explanation of the muon $g-2$ anomaly: bottom partner chiral enhancement case