Double Higgs boson production is a promising process to measure the self coupling of Higgs bosons. The dominant contribution to the cross section is given by the gluon fusion channel. In the talk several recent higher order results are discussed. Among them are combinations of exact results and high-energy expansions at next-to-leading order and large top quark mass expansions at next-to-next-to-leading order. Furthermore, we discuss the effective coupling of two Higgs bosons to gluons up to third order in perturbation theory.
Daniele Barducci