Revisiting Signature of Minimal Gauge Mediation

TL;DR

This paper reevaluates the phenomenology of minimal gauge-mediated supersymmetry breaking, highlighting its implications for low-energy observables and recent experimental data, especially concerning the muon g-2 and B-meson decays.

Contribution

It provides updated analyses of low-energy observables within minimal gauge mediation, emphasizing the preference for a low messenger scale and specific superpartner mass ranges based on recent data.

Findings

Current data favor a messenger scale around 100 TeV.

Gluino mass is suggested to be around 1 TeV.

Strong correlations exist among various B-meson decay observables.

Abstract

We revisit phenomenology of the minimal gauge-mediated model. This model is motivated from the SUSY CP and flavor problems. A specific feature of this model is that \tan\beta is naturally large, since the B term in the Higgs potential is zero at the messenger scale. This leads to significant SUSY contributions to various low-energy observables. We evaluate the anomalous magnetic moment of the muon and the branching ratio of \bar{B}\to X_s\gamma taking account of recent theoretical and experimental developments. We find that the current experimental data prefer a low messenger scale (\sim 100 TeV) and gluino mass around 1 TeV. We also calculate the branching ratios of \bar{B}\to X_s l^+l^-, B_s\to \mu^+\mu^-, and B^-\to \tau^- \bar{\nu}, and show that these observables are strongly correlated with each other in this model.