Natural anomaly-mediation from the landscape with implications for LHC SUSY searches

TL;DR

This paper explores natural anomaly-mediation models derived from the string landscape, addressing conflicts in supersymmetric models with LHC constraints, and discusses potential experimental signatures for upcoming searches.

Contribution

It introduces a natural anomaly-mediation framework from the string landscape that alleviates previous conflicts with LHC data and predicts specific experimental signatures.

Findings

nAMSB spectra with $m_{3/2}$ 90-200 TeV are consistent with constraints.

Potential excesses observed in ATLAS and CMS data in certain channels.

Predicted signatures include soft dileptons, jets, MET, and wino decay channels.

Abstract

Supersymmetric models with the anomaly-mediated SUSY breaking (AMSB) have run into serious conflicts with 1. LHC \textit{sparticle} and Higgs mass constraints, 2. constraints from wino-like WIMP dark matter searches and 3. bounds from naturalness. These conflicts may be avoided by introducing changes to the underlying phenomenological models providing a setting for natural anomaly-mediation (nAMSB). We examine spectra of nAMSB arising from string landscape. Here, we investigated LHC constraints on nAMSB models that allow $m_{3/2}$ to lie within 90$-$200 TeV which may soon be discovered or falsified by a combination of 1. soft OS dilepton plus jet+ MET (OSDLJMET) searches which arise from higgsino pair production, 2. non-boosted hadronically decaying wino pair production searches and 3. same-sign diboson + MET searches arising from wino pair production followed by wino decay to W +higgsino. Some excess above SM background in the OSDLJMET channel already seems to be present in both ATLAS and CMS data.