Impact of Sommerfeld Effect and Bound State Formation in Simplified $t$-Channel Dark Matter Models

Abstract

The existence of a dark matter model with a rich dark sector could be the reason why WIMP dark matter has evaded its detection so far. For instance, colored co-annihilation naturally leads to the prediction of heavier dark matter masses. Importantly, in such a scenario the Sommerfeld effect and bound state formation must be considered in order to accurately predict the relic abundance. Based on the example of the currently widely studied $t$-channel simplified model with a colored mediator, we demonstrate the importance of considering these non-perturbative effects for correctly inferring the viable model parameters. We emphasize that a flat correction factor on the relic abundance is not sufficient in this context. Moreover, we find that parameter space thought to be excluded by direct detection experiments and LHC searches remains still viable. Additionally, we illustrate that long-lived particle searches and bound-state searches at the LHC can play a crucial role in probing such a model. We demonstrate how future direct detection experiments will be able to close almost all of the remaining windows for freeze-out production, making it a highly testable scenario.

47 pages + appendices, 14 Figures

References in corpus (20)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• An Introduction to PYTHIA 8.2
• micrOMEGAs2.0: a program to calculate the relic density of dark matter in a generic model
• Non-perturbative Effect on Thermal Relic Abundance of Dark Matter
• Towards a public analysis database for LHC new physics searches using MadAnalysis 5
• Bound-state formation for thermal relic dark matter and unitarity
• Dark-matter bound states from Feynman diagrams
• The Extent of the Stop Coannihilation Strip
• Anatomy of Coannihilation with a Scalar Top Partner
• Neutralino-stop co-annihilation into electroweak gauge and Higgs bosons at one loop
• Effects of QCD bound states on dark matter relic abundance
• Diphoton decays of stoponium at the Large Hadron Collider
• Non-Abelian Electric Field Correlator at NLO for Dark Matter Relic Abundance and Quarkonium Transport
• SUSY-QCD corrections to stop annihilation into electroweak final states including Coulomb enhancement effects
• Bound-state effects on dark matter coannihilation: Pushing the boundaries of conversion-driven freeze-out
• Leptoquark manoeuvres in the dark: a simultaneous solution of the dark matter problem and the $R_{D^{(\ast )}}$ anomalies
• Higgs-mediated bound states in dark-matter models
• Squark-pair annihilation into quarks at next-to-leading order
• Bound states of WIMP dark matter in Higgs-portal models. Part I. Cross-sections and transition rates
• Loop induced top quark FCNC through top quark and dark matter interactions

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• Excited bound states and their role in dark matter production
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• Dark Matter Direct Detection in $t$-channel mediator models
• t-channel dark matter at the LHC -- a whitepaper
• Final bound-state formation effect on dark matter annihilation
• The Forward Physics Facility at the High-Luminosity LHC
• BSFfast: Rapid computation of bound-state effects on annihilation in the early Universe