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

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.

35 pages, 10 figures, v2 : typos fixed, published version, v3 : corrections due to missing factor of 1/2 in gluon fusion amplitude via fermion loop included, plots unchanged as the factor is absorbed into the relevant parameters chosen for each plot, conclusions unchanged, published errata lists changes included in v3