Burgeoning the Higgs mass to 125 GeV through messenger-matter interactions in GMSB models

Abstract

A 125 GeV Higgs renders the simpler GMSB models unnatural, essentially pushing the soft spectrum beyond the LHC reach. A direct coupling of the matter and messenger fields, that facilitates an enhanced mixing in the squark sector, is a way to ameliorate this deficiency. We construct all possible messenger-matter interaction terms considering the messenger multiplets in 1, 5 and 10 dimensional representations of the SU(5). A Froggatt-Nielsen like flavor framework connected with the origin of fermion mass hierarchy is utilized to control the interaction terms and suppress FCNC. We perform a detailed comparative study of the efficiency of such interaction terms to boost the Higgs mass keeping the soft spectrum light. We identify the more promising models and comment on their status in present and future collider studies.

Gauge mediation beyond minimal flavor violation

“…On the other hand, minimal realizations of GMSB are now seriously challenged by the Higgs boson discovery at the LHC, since they can account for m h ≈ 126 GeV only at the price of large fine-tuning and a spectrum beyond the reach of the LHC. This has recently motivated several attempts to extend the minimal GMSB framework by direct couplings of GMSB messengers to MSSM fields [6][7][8][9][10][11][12][13][14]. While most of this models preserve the MFV structure of Minimal Gauge Mediation, we found particularly interesting the setup considered in ref.…”

“…This calls for extensions of the minimal framework, as recently discussed in refs. [6][7][8][9][10][11][12][13][14]. For earlier works in this direction see refs.…”

Signs of tops from highly mixed stops

“…We study the constraint imposed on such models by flavour observables and by the requirement of a viable Higgs mass. A similar extension of the gauge mediation scheme has been recently studied in several different contexts [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27], for instance with the purposes of addressing the µ − B µ problem, of raising the Higgs mass and/or investigating their possibly unusual flavor patterns.…”

“…This class of models has recently been studied in several papers [11][12][13][14][16][17][18][19][20][21][22][23][24][25][26][27]]. An interesting aspect of the above mentioned superpotential deformations is that they are not automatically diagonal in flavour space, and hence they can represent controllable sources of flavour violation, which are normally absent in standard gauge mediation.…”

Focus point supersymmetry in extended gauge mediation

“…refs. [105,[109][110][111][112][113][114][115][116][117][118][119]. However, in this paper we assume that the gaugino masses and all A-terms are suppressed through conformal sequestering as discussed below.…”