Gaugino Anomaly Mediated SUSY Breaking: phenomenology and prospects for the LHC

TL;DR

This paper explores the phenomenology of Gaugino Anomaly Mediation (inoAMSB), a SUSY breaking scenario with distinctive gaugino mass patterns, and assesses its detectability at the LHC through specific signals like multi-jet events and dilepton edges.

Contribution

It introduces and analyzes the inoAMSB model, highlighting its unique gaugino mass spectrum, suppressed scalar masses, and distinctive collider signatures, expanding the landscape of SUSY breaking scenarios.

Findings

LHC can probe inoAMSB up to gluino masses of ~2.6 TeV.

Distinctive signals include multi-jet + missing energy and dilepton mass edges.

Suppressed flavor and CP violation due to minimal scalar and trilinear soft terms.

Abstract

We examine the supersymmetry phenomenology of a novel scenario of supersymmetry (SUSY) breaking which we call Gaugino Anomaly Mediation, or inoAMSB. This is suggested by recent work on the phenomenology of flux compactified type IIB string theory. The essential features of this scenario are that the gaugino masses are of the anomaly-mediated SUSY breaking (AMSB) form, while scalar and trilinear soft SUSY breaking terms are highly suppressed. Renormalization group effects yield an allowable sparticle mass spectrum, while at the same time avoiding charged LSPs; the latter are common in models with negligible soft scalar masses, such as no-scale or gaugino mediation models. Since scalar and trilinear soft terms are highly suppressed, the SUSY induced flavor and CP-violating processes are also suppressed. The lightest SUSY particle is the neutral wino, while the heaviest is the gluino. In this model, there should be a strong multi-jet +etmiss signal from squark pair production at the LHC. We find a 100 fb^{-1} reach of LHC out to m_{3/2}\sim 118 TeV, corresponding to a gluino mass of \sim 2.6 TeV. A double mass edge from the opposite-sign/same flavor dilepton invariant mass distribution should be visible at LHC; this, along with the presence of short-- but visible-- highly ionizing tracks from quasi-stable charginos, should provide a smoking gun signature for inoAMSB.