Yukawa radiative corrections to the trilinear self-couplings of neutral CP-even Higgs bosons and decay width $Γ(H \to hh)$ in the MSSM

Abstract

The four self-couplings $λ_{hhh}$, $λ_{hhH}$, $λ_{hHH}$, $λ_{HHH}$ and decay width $Γ(H \to hh)$ are calculated taken into account one-loop $t,b,c$ - (s)quarks, $τ$ - (s)lepton corrections in the framework of the Minimal Supersymmetric Standard Model (MSSM). By the example of self-couplings dependencies from $ \tg β$ and \textrm{$M_A$}, it is shown, that calculated corrections can give the essential contribution to self-couplings and decay width determined at one-loop level. The radiative corrections account becomes necessary condition for performance of Higgs potential reconstruction procedure and experimental confirmation of Higgs mechanism.