Phenomenological Implications of Deflected Mirage Mediation: Comparison with Mirage Mediation

TL;DR

This paper compares the collider signatures of mirage mediation and deflected mirage mediation, highlighting how gauge mediation contributions in the latter significantly alter the superpartner spectrum and impact LHC discovery prospects.

Contribution

It introduces benchmark models for deflected mirage mediation and analyzes how gauge mediation affects the low energy supersymmetric spectrum.

Findings

Deflected mirage mediation can produce a compressed gaugino spectrum.

Gluino can be significantly lighter than other colored superpartners.

Gauge mediation contributions can drastically change collider phenomenology.

Abstract

We compare the collider phenomenology of mirage mediation and deflected mirage mediation, which are two recently proposed "mixed" supersymmetry breaking scenarios motivated from string compactifications. The scenarios differ in that deflected mirage mediation includes contributions from gauge mediation in addition to the contributions from gravity mediation and anomaly mediation also present in mirage mediation. The threshold effects from gauge mediation can drastically alter the low energy spectrum from that of pure mirage mediation models, resulting in some cases in a squeezed gaugino spectrum and a gluino that is much lighter than other colored superpartners. We provide several benchmark deflected mirage mediation models and construct model lines as a function of the gauge mediation contributions, and discuss their discovery potential at the LHC.