Effects from New Colored States and the Higgs Portal on Gluon Fusion and Higgs Decays

TL;DR

This paper investigates how new colored particles and Higgs portal interactions influence gluon fusion production and Higgs decay channels, highlighting potential deviations from Standard Model predictions due to loop effects and scalar mixing.

Contribution

It provides a detailed analysis of loop contributions from new colored scalars, fermions, vectors, and the impact of Higgs portal-induced scalar mixing on Higgs production and decay.

Findings

New colored states significantly alter gluon fusion rates.

Scalar mixing affects Higgs branching fractions.

Inclusion of new physics can reconcile experimental fits with Standard Model expectations.

Abstract

We study effects from new colored states and the Higgs portal on gluon fusion production. We isolate possible loop contributions from new colored scalars, fermions, and vectors, incorporating effects from Higgs portal-induced scalar mixing, leading to dramatic effects on gluon fusion and branching fractions. Higgs identification must generally allow for these effects, and using our results, possible tensions from fits to the Standard Model expectation can be relieved by inclusion of New Physics effects.