Impact on the Higgs Production Cross Section and Decay Branching Fractions of Heavy Quarks and Leptons in a Fourth Generation Model

Understand

In a fourth generation model with heavy quarks, the production cross section of the Higgs boson in the gluon-gluon fusion process is significantly increased due to additional quark loops.

• In a similar way, the partial decay width of the decay channels $H\rightarrow gg, \gamma \gamma$ and $\gamma Z$ is modified.
• These changes and their impact on the Higgs search are discussed.