On the radiative corrections to the neutral Higgs boson masses in the NMSSM

TL;DR

This paper presents a comprehensive one-loop and two-loop correction calculation for the neutral Higgs boson masses in the NMSSM, significantly refining theoretical predictions and their comparison with experimental data.

Contribution

It provides the first full one-loop self-energy and tadpole calculations along with two-loop corrections in the effective potential, improving accuracy over previous models.

Findings

Corrections can shift Higgs masses by a few GeV.

Mixing between singlet and MSSM-like Higgs is significantly affected.

Enhanced precision aids in distinguishing NMSSM from MSSM predictions.

Abstract

We provide a full one-loop calculation of the self energies and tadpoles of the neutral Higgs bosons of the NMSSM. In addition, we compute the two-loop O(alpha_t*alpha_s+alpha_b*alpha_s) corrections to the neutral Higgs boson masses in the effective potential approximation. With respect to earlier calculations, the newly-computed corrections can account for shifts of a few GeV in the light scalar and pseudoscalar masses, and they can also sizeably affect the mixing between singlet and MSSM-like Higgs scalars. Taking these corrections into account will be crucial for a meaningful comparison between the MSSM and NMSSM predictions for the Higgs sector.