Anomaly mediated SUSY breaking model retrofitted for naturalness

Abstract

Anomaly-mediated supersymmetry breaking (AMSB) models seem to have become increasingly implausible due to 1. difficulty in generating a Higgs mass m(h)~125 GeV, 2. typically unnatural superparticle spectra characterized by a large superpotential mu term and 3. the possibility of a wino-like lightest SUSY particle (LSP) as dark matter now seems to be excluded. In the present paper we propose some minor modifications to the paradigm model which solve these three issues. Instead of adding a universal bulk scalar mass to avoid tachyonic sleptons, we add distinct Higgs and matter scalar soft masses which then allow for light higgsinos. To gain accord with the measured Higgs mass, we also include a bulk trilinear soft term. The ensuing natural generalized AMSB (nAMSB) model then has a set of light higgsinos with mass nearby the weak scale m(W,Z,h)~100 GeV as required by naturalness while the winos populate the several hundred GeV range and gluinos and squarks occupy the multi-TeV range. For LHC searches, the wino pair production followed by decay to same-sign diboson signature channel offers excellent prospects for discovery at high luminosity LHC along with higgsino pair production leading to soft dileptons plus jet(s)+MET. A linear e^+e^- collider operating above higgsino pair production threshold should be able to distinguish the AMSB gaugino spectra from unified or mirage unified scenarios. Dark matter is expected to occur as a higgsino-like WIMP plus axion admixture.

26 pages with 12 .png figures

References in corpus (16)

• Search for dark matter annihilations towards the inner Galactic halo from 10 years of observations with H.E.S.S
• Supersymmetry, Naturalness, and Signatures at the LHC
• Search for squarks and gluinos in final states with jets and missing transverse momentum using 36 fb${}^{-1}$ of $\sqrt{s}$=13 TeV $pp$ collision data with the ATLAS detector
• SUSY models under siege: LHC constraints and electroweak fine-tuning
• Monojet plus soft dilepton signal from light higgsino pair production at LHC14
• Supersymmetry, Naturalness, and Light Higgsinos
• SUSY under siege from direct and indirect WIMP detection experiments
• Accessing the core of naturalness, nearly degenerate higgsinos, at the LHC
• Physics at a Higgsino Factory
• Coupled Boltzmann computation of mixed axion neutralino dark matter in the SUSY DFSZ axion model
• Natural generalized mirage mediation
• The Reach of the High-Energy LHC for Gluinos and Top Squarks in SUSY Models with Light Higgsinos
• On Anomaly Mediated SUSY Breaking
• Comments on Quantum Effects in Supergravity Theories
• Hypercharged Anomaly Mediation
• Aspects of the same-sign diboson signature from wino pair production with light higgsinos at the high luminosity LHC

Cited by in corpus (13)

• Midi-review: Status of weak scale supersymmetry after LHC Run 2 and ton-scale noble liquid WIMP searches
• Anomalous muon magnetic moment, supersymmetry, naturalness, LHC search limits and the landscape
• Is natural higgsino-only dark matter excluded?
• LHC luminosity and energy upgrades confront natural supersymmetry models
• Gravity safe, electroweak natural axionic solution to strong CP and SUSY mu problems
• The quest to discover supersymmetry at the ATLAS experiment
• The ILC as a natural SUSY discovery machine and precision microscope: from light higgsinos to tests of unification
• A string landscape guide to soft SUSY breaking terms
• Natural Supersymmetry: Status and Prospects
• Fine-tuned vs. natural supersymmetry: what does the string landscape predict?
• Investigating New Physics Models with Signature of Same-Sign Diboson + ${E/}_T$
• Lepton flavor violation from SUSY with non-universal scalars
• $E_6$ Models in Light of Precision $M_W$ Measurements