Speaker
Description
The MSSM Higgs sector extended by dimension-six operators $U^{(6)}$ [1], which are loop contributions in a Coleman-Weinberg-type potential, is considered. The presence of such additional contributions allows reopening phenomenological MSSM scenarios [2] closed in previous analyses.
In order to restrict corresponding parameter space, perturbative unitarity constraints must be satisfied.
The common approach for checking this is to consider a two-particle scattering
matrix of scalars in the large center-of-mass energy $\sqrt{s}$ limit where only point interactions contribute [3].
However, due to SUSY-particles interactions in MSSM,
trilinear couplings can be significant and
large contributions are present
at smaller $\sqrt{s}$ [4].
We find the analytical formula for quartic and cubic couplings for the Higgs potential extended by dimension-six operators,
compare results with loop corrected constraints, which use the large $\sqrt{s}$ approximation with and without additional $U^{(6)}$-contributions, and
show how the allowed regions in the parameter space are affected in these cases.
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- M. D. Goodsell and F. Staub, Eur. Phys. J. C 78, 649 (2018); M. E. Krauss and F. Staub, Phys.Rev. D98, no.1, 015041 (2018).
