Constraining the Higgs Boson Coupling to Light Quarks in the $H\to ZZ$ Final States

Understand

We constrain the Higgs boson (Yukawa) coupling to quarks in the first two generations in the $H\to ZZ$ final states.

• Deviation of these couplings from the Standard Model values leads to change in the Higgs boson width and in the cross sections of relevant processes.
• In the Higgs boson resonance region, an increased light Yukawa coupling leads to an increased Higgs boson width, which in turn leads to a decreased cross section.
• In the off-shell region, increased Yukawa couplings result in an enhancement of the Higgs boson signal through $q\bar{q}$ annihilation.