Reconciling the muong−2, a 125 GeV Higgs boson, and dark matter in gauge mediation models

Abstract

We present a class of models in the framework of gauge mediation supersymmetry breaking where the standard model is supplemented by additional U(1) symmetry which acts only on the third generation fermions. The messenger fields carry nontrivial U(1) charge and are vector-like particles under this symmetry. This leads to additional contribution to the soft supersymmetry breaking mass terms for the third generation squarks and sleptons. In this framework we show that the muon g − 2 anomaly, the observed 125 GeV Higgs boson mass and the detected relic dark matter abundance (gravitino in our case) can be simultaneously accommodated. The resolution of the muon g − 2 anomaly, in particular, yields the result that the first two generation squark masses, as well the gluino mass, should be 2.5 TeV, which will be tested at LHC14.

Muon g − 2 and related phenomenology in constrained vector-like extensions of the MSSM

“…As an alternative, one can resolve the (g − 2) µ discrepancy by extending the particle content of the MSSM with vector-like (VL) matter, as investigated, e.g., in [29][30][31][32][33][34][35][36][37]. The introduction of VL superfields in the superpotential brings along extra degrees of freedom without spoiling the successful unification of gauge interactions at the GUT scale [38].…”

Gauge mediation models with adjoint messengers

“…Note that in the GMSB scenario additional contributions from non-zero D term associated with flavor U (1) B−L symmetry to the sfermion SSB mass terms were studied in ref. [24]. The A-terms in our scenario vanish at the messenger scale, which is very common in GMSB models (except when the MSSM and messenger fields are mixed [25], which we do not consider in this study).…”

Impact of LHC data on muon g−2 solutions in a vectorlike extension of the constrained MSSM

“…There have also been alternative solutions as for example, adding vector-like (VL) matter to MSSM which has been studied in Refs. [23][24][25][26][27][28][29][30][31][32]. The presence of new VL sector gives extra contribution to (g − 2) µ by introducing new sources of smuon mixing and new Yukawa couplings [32].…”

“…The presence of new VL sector gives extra contribution to (g − 2) µ by introducing new sources of smuon mixing and new Yukawa couplings [32]. Apart from (g − 2) µ , it has been shown that VL colored sparticles provide extra contributions to Higgs mass [33][34][35][36][37][38] and several phenomenological analyses have addressed the extra VL matter in the context of various long-standing theoretical issues related to beyond SM physics [23][24][25][26][27][28][29][30][31][32].…”