Exploring non-holomorphic soft terms in the framework of gauge mediated supersymmetry breaking

Abstract

It is known that in the absence of a gauge singlet field, a specific class of supersymmetry (SUSY) breaking non-holomorphic (NH) terms can be soft breaking in nature so that they may be considered along with the Minimal Supersymmetric Standard Model (MSSM) and beyond. There have been studies related to these terms in minimal supergravity based models. Consideration of an F-type SUSY breaking scenario in the hidden sector with two chiral superfields however showed Planck scale suppression of such terms. In an unbiased point of view for the sources of SUSY breaking, the NH terms in a phenomenological MSSM (pMSSM) type of analysis showed a possibility of a large SUSY contribution to muon g − 2, a reasonable amount of corrections to the Higgs boson mass and a drastic reduction of the electroweak fine-tuning for a higgsino dominated χ 0 1 in some regions of parameter space. We first investigate here the effects of the NH terms in a low scale SUSY breaking scenario. In our analysis with minimal gauge mediated supersymmetry breaking (mGMSB) we probe how far the results can be compared with the previous pMSSM plus NH terms based study. We particularly analyze the Higgs, stop and the electroweakino sectors focusing on a higgsino dominated χ 0 1 and χ ± 1 , a feature typically different from what appears in mGMSB. The effect of a limited degree of RG evolutions and vanishing of the trilinear coupling terms at the messenger scale can be overcome by choosing a non-minimal GMSB scenario, such as one with a matter-messenger interaction.

Charting generalized supersoft supersymmetry

“…Suppressed stop sector mixing can be overcome by taking largeξ u , though this is an unattractive option as it will increase the traditional fine tuning measure of the setup. Moreover, even if we set aside tuning concerns for the moment, we find that even very large values ofξ u are unable to push the Higgs mass to more than 100 GeV (recent works, studying the phenomenological implications of such non-standard soft supersymmetry breaking terms in MSSM can be found in [108,109]). In addition to the tree level terms, we have also included two loop corrections from the stop sector [110] (for three loop corrections in MSSM see [111]) and considered mt 1 ∼ mt 2 ∼ 1.8 TeV.…”

Radiatively generated source of flavor universal scalar soft masses

“…Both the benchmark points given in this work satisfy EWSB conditions. Even though References [50][51][52][53][54][55][56][57][58][59][60][61][62][63][64][65][66] that have explored phenomenological consequences of the C-term are aplenty, in this work we, for the first time, find its usage in building models of EW supersymmetry. These terms, if present, impart a subtle feature to the RGEs of soft supersymmetry breaking terms, which allows us to resurrect an elegant class of models.…”

Probing lepton flavor violating decays in MSSM with non-holomorphic soft terms

“…Similarly, the non-holomorphic (NH) terms may also be helpful to fulfill constraints from rare B-decays (viz. Br(B → X s γ), Br(B s → µ + µ − ) etc) both in a phenomenological MSSM (pMSSM) like scenario [78] or in some high scale model like constrained MSSM (CMSSM) [79][80][81] or minimal Gauge Mediated Supersymmetry Breaking (mGMSB) [82]. Another interesting feature is that a small NH trilinear coupling (namely A µ ) may be capable to attune the inflexible constraints of (g − 2) µ [78].…”