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

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.

30 pages including 14 .eps figures

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• Where the Sidewalk Ends: Jets and Missing Energy Search Strategies for the 7 TeV LHC
• Coupled Boltzmann calculation of mixed axion/neutralino cold dark matter production in the early universe
• ${\alpha }^{\prime }$ Inflation: Moduli Stabilisation and Observable Tensors from Higher Derivatives
• Classical and Quantum SUSY Breaking Effects in IIB Local Models
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• Physical Vacua in IIB Compactifications with a Single Kaehler Modulus
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• Testing the gaugino AMSB model at the Tevatron via slepton pair production
• Dark Matter density and the Higgs mass in LVS String Phenomenology
• A Comparison of Supersymmetry Breaking and Mediation Mechanisms
• A Unified Approach to Supersymmetry Breaking