Leading two-loop corrections to the Higgs boson self-couplings in models with extended scalar sectors
Leading two-loop corrections to the Higgs boson self-couplings in models with extended scalar sectors
Abstract We compute the dominant two-loop corrections to the Higgs trilinear coupling $$\lambda _{hhh}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>λ</mml:mi><mml:mrow><mml:mi>hhh</mml:mi></mml:mrow></mml:msub></mml:math> and to the Higgs quartic coupling $$\lambda _{hhhh}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>λ</mml:mi><mml:mrow><mml:mi>hhhh</mml:mi></mml:mrow></mml:msub></mml:math> in models with extended Higgs sectors, using the effective-potential approximation. We provide in this paper all necessary details about our calculations, and present general …