Constraints on heavy colored scalars from Tevatron's Higgs exclusion limit

TL;DR

This paper analyzes how Tevatron Higgs exclusion limits constrain models with heavy colored scalars, setting lower bounds on their masses based on their impact on Higgs production rates.

Contribution

It provides the first detailed constraints on heavy colored scalars in specific QCD representations from Tevatron Higgs search results.

Findings

Adjoint scalar mass > 200 GeV

Fundamental scalar mass > 100 GeV

Strong bounds on colored scalar extensions

Abstract

The null search for the Higgs boson at the Tevatron implies strong constraints on heavy colored particles that increase the gluon-fusion induced production rate of the Higgs. We investigate the implications of the Tevatron exclusion limit on example extensions of the Standard Model that contain a new scalar state transforming as either an adjoint or a fundamental under the QCD gauge group. The bounds on the adjoint (fundamental) scalar mass exceed 200 GeV (100 GeV) for natural choices of scalar-sector parameters.