Abstract:
We present a complete one-loop computation of the H → W Z decay in the aligned two-Higgsdoublet model. The constraints from the electroweak precision observables, perturbative unitarity, vacuum
stability, and flavor physics are all taken into account along with the latest Large Hadron Collider searches
for the charged Higgs. It is observed that a large enhancement of the branching ratio can be obtained in the
limit where there is a large splitting between the charged and pseudoscalar Higgs masses as well as for the
largest allowed values of the alignment parameter ςu. We find that the maximum possible branching ratio in
the case of a large mass splitting between mH and mA is ≈10−3 for mH ∈ ð200; 700Þ GeV.
