  Higgs pair production is one of the primary goals of the LHC program.
Investigating the effects beyond the Standard Model (BSM) is then of high
interest. Two cases are presented to exemplify the impact of BSM physics on
Higgs pair production and on the triple Higgs coupling: first a review on
charged Higgs pair production mostly in the context of Two-Higgs-Doublet of
type II and in particular the Minimal Supersymmetric SM, second a study of the
one-loop effects of a heavy neutrino on the triple Higgs coupling.
