Revisiting R-invariant direct gauge mediation

Abstract

Abstract:We revisit a special model of gauge mediated supersymmetry breaking, the "R-invariant direct gauge mediation." We pay particular attention to whether the model is consistent with the minimal model of the µ-term, i.e., a simple mass term of the Higgs doublets in the superpotential. Although the incompatibility is highlighted in view of the current experimental constraints on the superparticle masses and the observed Higgs boson mass, the minimal µ-term can be consistent with the R-invariant gauge mediation model via a careful choice of model parameters. We derive an upper limit on the gluino mass from the observed Higgs boson mass. We also discuss whether the model can explain the 3σ excess of the Z+jets+E miss T events reported by the ATLAS collaboration.

ATLAS on-Z excess via gluino-Higgsino-singlino decay chains in the NMSSM

“…After the report, many scenarios in the MSSM as well as in the NMSSM have been proposed to explain the ATLAS on-Z excess without conflicting with constraints from various SUSY searches including the CMS on-Z result [6,[8][9][10][11][12][13][14][15][16][17][18][19][20]. To have on-shell Z bosons in final states while escaping other SUSY search constraints, scenarios with a gravitino as the lightest SUSY particle (LSP) seems to be one of the simplest possibilities.…”

“…When the lightest CP even Higgs boson is the SM-like one and M A is very large, the contribution of an off-diagonal mass termM 2 R23 (eq. (2.13)) to the mass of the SM-like Higgs boson is roughly estimated as follows, 1 20) which leads to a too light SM-like Higgs boson mass. This undesirable negative contribution via the singlet-doublet mixing can be avoided if λ 1 or when the following condition is satisfied,…”