Speaker
Description
We study a generalized NMSSM in which a gauge singlet connects the MSSM $\mu$ problem to neutrino masses from the type-II seesaw. Its vacuum expectation value contributes to $\mu_{\rm eff}$ and generates the supersymmetric mass of a vectorlike electroweak triplet pair. Integrating out the triplets yields the Weinberg operator, while their gauge charges admit a possible messenger interpretation. A correlated cancellation between the explicit $\mu$ term and the singlet contribution keeps $\mu_{\rm eff}$ near the scale of soft supersymmetry breaking. We derive the matching conditions and find low-energy spectra consistent with the relevant theoretical and experimental constraints. In the neutralino sector, viable bino-like dark matter requires efficient annihilation or coannihilation and is strongly constrained by direct detection. Singlino-like dark matter has suppressed nucleon scattering, with the Planck-compatible relic abundance predominantly set by electroweakino coannihilation.
