Higgs boson production and decay: Dalitz sector

The processes H→f¯fγ(g), pp→q¯+q→H+γ(g) and pp→q(q¯)+g→H+q(q¯) pose severe challenges to the experimental analysis. They represent rare decays and production mechanisms of the Higgs boson at LHC. However, they are not Yukawa suppressed at next-to-leading order opening a window for the correct definition of pseudo-observables, e.g. a definition of Γ(H→Zγ) with universal inherent meaning, that are currently used in extracting information for the couplings of the newly discovered resonance at LHC. The impact of genuinely electroweak NLO corrections is discussed, as well as the comparison of σ(pp→ggX→e+e−γ) to its zero-width approximation.