Role of h→ηη in intermediate-mass Higgs Boson searches at the large hadron collider

The dominance of the h ->eta eta decay mode for the intermediate-mass Higgs boson is highly motivated to solve the little hierarchy problem and to ease the tension with the precision data. However, the discovery modes for m(h)less than or similar to 150 GeV, h ->gamma gamma, and W/Zh ->(l nu/l (l) over bar)(b (b) over bar), will be substantially affected. In this Letter, we show that h ->eta eta -> 4b is complementary and we can use this decay mode to detect the intermediate Higgs boson at the LHC, via Wh and Zh production. Requiring at least one charged lepton and 4B tags in the final state, we can identify a clean Higgs boson signal for m(h)less than or similar to 150 GeV with a high significance and with a full Higgs mass reconstruction. We use the next-to-minimal supersymmetric standard model and the simplest little Higgs model for illustration.